I believe you have experienced a change in your relationship with your sister.. ie you dont feel as close to her a you once did.. not sure you know her as well as you once did.. afraid that she is not as connected to you as you felt before.
Perhaps she has things in her life that seem to come before you.
Do know that nothing is stronger than that blood bond you share with her.. her or your life situations may be changing, but she will always be your sister, nothing take that place.
I am unsure if you are male or female.
This may also mean that you should address what you may consider feminine qualities in yourself if you are male..
Each of us are made up of male and female qualities and it is important for us to accept both characteristics..
ie a male needing to get in touch with his softer side is not gay

.. its a perfectly normal part of who we are.. yin and yang
If this second is the one that resonanates with you, do not be afraid to tell someone you could use a hug

.. we girls love that in a guy.