I met a guy about 1 month and half ago and since then we are inseparable. We talk all day and he drives a long way just to see me. He says that he sees us in a formal relationship. Until, yesterday i found out that he slept with his coworker 2 or 3 times and apparently they keep doing it since she lives only like 5 minutes away from him and i live so far. Also, seems that she has romantic feelings for him but he told me that he does not feel that way for her. I know we are not in a committed relationship and we have only know each other for a short period of time. I do not know if i am overreacting but what happens is that knowing that she has romantic feelings for him is killing me.