Like I said before, my opinion on this matter would be completely different if she wasn't sleeping with some other man. If she just needed a break to find herself, I'd be a lot more supportive of you going back to her after the summer is over. But you have to think that her definition of finding herself is SLEEPING with ANOTHER MAN. Are you really okay with that? Do you really see nothing wrong with that? I will repeat what I've said... if she really loved you, she would NOT be sleeping with another man right now.