Try not to over-analyze things so much.

I'm sure you're a GOOD PERSON. I think right now you're just too worried about everything.
Mulan, not all of us can be the MOST popular people in the College. Some of us are perhaps shyer than others, or interested in other things besides social groups, or photo contests, etc. So don't compare yourself to others.
And don't over-analyze things either.

Try to relax and ENJOY your life, Mulan. You aren't "strange." You're an individual!!
If you feel you are troubled, please see a therapist. It would be a good idea -- a therapist can help you sort things out and get you on the right track.
I wish you the very best. God bless and please take care. Hugs, Lee