Please help :'( girl doesnt want me anymore, is there anything i can do?

Aww, I'm sorry that happened ): Play it cool and focus on other stuff for a little while, i know it's hard and it sucks but you gotta leave it alone until she contacts you. Mistakes are mistakes but I think she might be blowing this out of proportion on purpose. She may be acting immaturely but the harsh truth might be that she really doesn't want a relationship, which is her choice to make. I'm sorry dude, don't waste time on someone like that! Hang in there i hope things go okay