HELP ME OUT - BOYFRIEND PROBLEM

Okay so my boyfriend cheated on me a little over a year ago and I've had a really hard time coming to terms with it because he lied and it was just really shitty of him to do. My boyfriend works as a lifeguard at the y and recently I found out (not from him) that she works as a lifeguard there too. We go to school out of town and when the mention of summer came up he said he wanted to stay here and work even though he has a better job in our home town. Should I confront him? Like why hasn't he told me that she works there... SOS I don't want to be the crazy girlfriend but I'm really upset