This situation is tearing me up...

need advice in this situation?
What should i do here and why would this girl act like this?

This girl at the gym whom i know she's iranian.I have been through incidents with her where we have stepped on each others toes(i'n asian american so perhaps some cultural differences or racial issues )we have been through harsh incidents,she knows i am an addict have paranoia and anger issues(probably nothing to do with it but i have verbally berated her before for pissing me off and even one time she thought what i did was offensive and ran out.),but despite all i have done to her and her crap to me,she will still try to wave at me and smile be polite and cordial, mirror my actions and things of that nature etc..what should i make of this?good or bad?and why would she act like this? I'm confused as hell.Lately she's been ignoring me,but her friends have been nice to me.(her male friends)no not in that way have been very nice to me....but i just stay away from her.What should i make of it and what should i do?

''i have verbally berated her before for pissing me off''
Well after you have done this sort of thing. She would be kinda imtimidated . so basically she only acting nice because she doesn't want to start trouble or something.
But just take it as a good thing atm.

So you go to the gym to pick fights with ethnic girls?

What's wrong with you?

Maybe starting a normal relationship without problems, do not fight with her more, and talk to her, explain that it wasn`t your intention to imtimidate her, just had a bad day.