The thing about dreams, is that they are designed by the Lord to point out an error in one’s thinking. Your statement, “No I do not believe myself to be overly feminine, in fact more like emotionless” may be showing the error that the dream is focused upon. The dream is showing you something that reality cannot (because you do not expect to see your physical body change sex in the real world). What is being pointed out is that, contrary to how you see yourself – “more like emotionless” - in a particular subject area this assessment may not be the truth. Based on the dream activity, the subject area in which you are not using your usual emotionless thinking is sex. There you are approaching the subject using an emotional perspective or bias. (because the sex all takes place with you as a female)

What the whole scene is showing is a switch from solitary masturbation to sex with a member of the opposite sex (as you are a girl having sex with a male in the dream) When going for this switch, you are not using your usual degree of logical thinking but acting on an emotional perspective or bias (because all the sex involves you as a female)

If your comment “I have no time for them with all my school.” means having no time for females, this could explain the being magically clothed. Are you somehow tricking yourself into thinking of leaving solitary sex for a sexual partner of the opposite sex without realizing it? How have your feelings of having no time for them all with school been acknowledged when going for a partner. Partners take time and so do relationships.

The scene with the friends is simply showing some confusion on a psychological level about what your real thoughts are. In your mind (as shown by the dream) you are not acting as if emotionless and you are making time for the opposite sex.
The gist of the last paragraph would seem to be simply that poor thinking and reasoning could be leading you into something that when awake, you say you don’t have time for.  
This is the best I can do with your dream. You’ll have to mull it over a bit.

When a dream has an overall positive emotional experience then I don't think we need to look for deeper soul secrets in a dream. The only thing  in dreams that is not symbolic and therefore needs no translation are emotions.

The dream can be divided into a few parts:
- discovery that you're not 100% male
- your reaction is to explore your feminine characteristics via masturbation
- then you want to share this with your friends... so, you are actually enjoying this discovery
- but you are frustrated and saddened when they don't believe you have feminine characteristics, but you don't dwell on this problem in your dream either
- a stranger becomes your male characeristics with which you have a union, and a very pleasurable one...

So, you're exploring, allowing, experimenting with and accepting these "female" tendencies, and most importantly enjoying it too. You even attempt to share your joy and show your more "feminine" side to your mates and have them recognize that as part of you too. Alas, guys amongst guys are often requited to pretend being 100% male: stumping each other on the shoulder, grunts, the type of jokes... a macho environment.

I don't believe we need to understand a dream in our waking life in order to understand a dream. It's a symbolical device to clarify emotional developments within ourselves to our higher brain regions that deal with our emotions and are capable to re-translate the symbolism as we dream. Even most "problem' dreams end with an ending where the dreamer gts it right, and came to grips with what one part of the brain is trying to make the other part of the brain understand. That you are befuddled and confused about the dream when you wake up has nothing to do with not having understood the dream when you dream it. Most of the time we don't even remember what we dreamt. We're not even supposed to remember, because memorizing is put out of work while we dream. Hence, you don't need to understand a dream in your waking state in order to have solved and integrated the dream lesson.

I took your request as one where you needed reassurance that you're not having this secret wish to be a woman. And that was the first I did. You're not having transgender desires, when you don't and dream of being the other gender and dream of a sexual act in that body (I dreamt once that I was a guy, and it involved sex too... and yet I love being a woman... I was able to giggle about it when awake later on, but I never had any problem with my more "male" characteristics... I've been a tomboy all of my life).The only more negative moment in the dream was when you had to convince "the guys" (as "your mates"), and that is a positive thing too. You think it's sad that you can't be 100% yourself in front of your friends.

Often we don't understand the purpose of our dreams in our waking life, because our waking brain tends to think literally... hence your worry and confusion. But the dream itself reveals that you are not confused about yourself at all. Instead within the dream you are very accepting of yourself and wish to express the whole being you are inside.  

This dream might reoccur as your curiosity expands. But it could be a wedding dream as well... another form of union. Expect such a dream when you're not exploring your "feminine' characteristics, but have completed the discovery process.

Per your PM I was glad to be of help