Should I go back to my girlfriend?

It's not a good idea to go back with your ex. She is the one who broke your heart with another man. Then why are you measurable. She is the one who should be measurable. Just relax, take some time and go out and have some fun with your friends. You'll be feeling much more better. And concentrate on your study. You shouldn't mess up your life just thinking about that cheater. You can do much better than her. Good luck sweetie :)