What should i do in the situation like this?

[McCarthy]

You have to weight the values of what your getting out of the relationship. If you feel like eventually you could forgive her, continue to be friends and communicate with her, then kinda take some time for yourself and ease back into the relationship. If you feel like, in a few days, you overreacted (not saying you did ) and it's no biggie, than just go back to the way it was, put it past you. If you feel like you're too hurt and won't be able to be comfortable with this girl anymore, break it off. So what if other people have their own opinions, you need to do what's right for you sometimes, not always worrying about how others might feel. Good Luck!!