According to numerology there may actually be something to this as
the 1 is a Life Path number that seems to be fated to shoulder the
burdens of fate all by him or herself. It is considered to be a
mundane number that is considered with the execution of every day
chores and very practical things. This means being with a 1 is not
that romantic because there is always "something to get done."

Life demands a lot from a number 1 and the number 1 in turn demands
a lot from other people. This can lead to some isolation simply
because most people like to have more fun in life.  However a 1
considers working a lot to be a great deal of fun.  There is no
other number that can mix business with pleasure as well as this
one. They rarely do anything without a business motivation in mind.
Even their vacations usually have to do something with social
climbing or scouting for business opportunities.

The busy schedule of a 1 also often leaves their partners feeling
secluded and lonely. It takes a very strong person to be with a 1
and few of them exist.  Often the 1 is like a politician or is an
actual politician that needs a partner that focuses on him or her
exclusively. Unfortunately that means that they attract a number
like a 2, 9 or 11. These numbers tend to focus more on other people
than themselves.  Unfortunately the 1 ends up alone after teaching
the 2, 9, and 11 a karmic lesson about learning to love themselves
more in life.

Often a 1 ends up lonely because the Life Path Number also means
standing up for your beliefs despite the fact that everyone else is
against you. It is the number of the noble martyr who stand up for
what is right in life. It is the number of a great leader who is so
self assured and innovative that their ideas often seem radical to
others. Many ones have notions that are far ahead of their time and
often they stand alone - like a David against a huge Goliath of
public objection.

A similar number is the 8.  An 8 can be a lonely number simply
because they are so busy being pillars of the community that they
do not have time for family or lovers.  Instead many of them are
busy building empires.

The timing in the life of an 8 is also similar to that of a 1. They
are often slave to economics and as they tend to employ or take
care of a lot of other people. Their lives are ruled by deadlines
and practical matters.

The 8 can end up lonely because the partner soon realizes that this
number is public property. Yet another problem is that the 8 is
always in the spotlight.

Anyone with a Life Path number 3 can also feel incredibly at times
in their life. This is the number of fame and it is the penultimate
number when it comes to being a living illustration of that old
saying "It's lonely at the top."

A number like 3 can draw a lot of attention yet find nobody that
they can identify with personally. That is because many of them are
phenonomenal talents that rocket to the top. This means that many
of them are used for their connections and money and are rarely
loved for who they really are.

It also does not help that the number 3 stands for the "odd man
out" in a love triangle and end up spending holidays all by
themselves. The Life Path number 3 is notorious for being unable to
settle down. Many of them are so attractive that they also attract
infidelity.  They become a "score" and are often not treated like
human beings that way.

Yet another "lonely number" is the number 5. This is because the 5
is fiercely dedicated to his or her own individual independence and
the right to exercise free will.  Anyone who interferes with this
number's whims is likely to be viewed as an obstruction by this
number.

The number 5 also likes to travel a great deal and loves being on
the road. During these extended periods of travel the 5 will often
have a series of lovers rather than just one.

Yet another quirk of the number 5 Life Path number is the constant
desire to be alone. This number is very much torn between their
love of solitude and their love of other people. Of all the numbers
the number 5 also sometimes displays an exaggerated need for
privacy.

The number 4 can also be a lonely Life Path number. Usually this
number has a very hard childhood and because of poverty and
societal discretions does not make friends easily.  This number
usually has to struggle with some kind of big problem in their life
and usually it has to do with a chronic health problem or addiction
that also prevents them from meeting other people and forming
relationships.  This is not absolutely true of every number 4 as
many of them are also quite adept at transcending every single
challenge to become quite beloved by many.  Oprah Winfrey is an
excellent example of a number 4 energy that has triumphed over a
number of setbacks in life to become one of the richest and most
famous people in the world.

The number 7 is not necessarily a lonely number so much as a number
that likes to be left alone. Many of the number 7s are eccentric
geniuses and prodigious talents that find people in general to get
in the way of their big vision.  Sometimes a 7 finally notices that
they have failed to attract a partner in life but usually the
contribution that they make to society in the form of an invention
or piece of literature far outweighs the importance of their
personal life.

So the next time you hear that 1 is the loneliest of numbers think
again!  It is not necessarily true!

1 and 3 are a little similar for me, but yes, sometimes they feel somewhat lonely too.

My cousin is 1, and really is much business oriented.
My other friend is 3, which is still blooming and I feel that she is really going to skyrocket...
My friend 8 is having problems with romantic love, as he still can't find someone right for him.
My friend 5 has a lot of girl friends, please note it's not a girlfriend, just friends, but as he had them all, he had no friend and I know that each girl fell for him, as my pin-point...

I know two people of number 4s, and sometimes I really feel like they're lonely too. Like, they need help with something, or I just imagine them on a train facing the sunset, just in solitude.
It's almost like they take all their own burden upon themselves, like don't want to rely on other people...

The 2, 6, and 9 people that I know have many friends, and I don't feel like they're going to be lonely anytime at all.
They're like magnets, of positive energy. They attract negative energy, such as the remaining other numbers.

As a 7, I feel like I don't have anyone. It's like no one understands me, to the point that I don't want to talk sometimes at all.

7 is by far the most lonely number. its the number of the loner

7 is by far the most lonely number. its the number of the loner

Numerology is any of many systems, traditions or beliefs in a mystical or esoteric relationship between numbers and physical objects or living things.
=========
Peter