I got screwed over what should i do?

honestly....ya..u got screwed over....but in all seriousness..just be there for her when she needs you...like let her call u and vent to you about her sucky day/her relationship problems...so that way when her and her bf break up...u will have been there for her and she will remember that even when "she was stupid" that u were her friend and that should score some brownie points