So, my girlfriend for the last 2 years. I was her first boyfriend, she's 21 and i'm 22. She start saying the she wants to try a relationship with another man, but she loves me, and she will not try now. But she wants to break up because she is feeling this, because she is thinking how it will eb with somebody else, we are leaving together in her appartment. 2 weeks ago she starter talking with one guy, she saw him one time and kissed him, after that she told me immediatly and cried all night long. After that she is telling me all this.. what should i do? Please help..