Used to feel that, at your age! Tomboy thinking, yep! That's me! Guess where it gets me now? Can talk 'shop'(aka sports) with the fellas!

Plus, I was blessed with three boys, to raise, so all that tomboy stuff, is paying off.
Not being into fashion, that was me, not now, but then.
I used to feel like an outcast, misunderstood. I did have friends, don't get me wrong, but I do identify with your loner word mention. I've grown into a person, that has a handful of close knit friends, and I can interact with all kinds of people, because of how I felt when I was younger, and just floating between the various types of groups/cliques, in school.
Can you talk more about eating? Are you, at least, getting the necessary nutritional value from you diet?