How do you know if your boyfriend is cheating on you?

I know my boyfriend is cheating. How should I tell him?

• We have been together for over a year. I am a straight woman and he is bi and has been sleeping with other men. I found out today because I opened my email on my phone and he hadn't logged out. I wasn't even snooping, but a suspicious message was directly in front of me. Lately he has been less affectionate and has not wanted to have sex often. Not sure whether to make it fun for me (really make him nervous) or just flat out go for it and say it (of course I'm upset about it) I love him very much. I'm going over to his house tonight and I had a couple ideas. 1. randomly saying, "when was the first time you cheated on me?" or "psst...I know you're cheating on me." 2. randomly start telling the story of how I found out he was cheating. 3. letting my emotions get to me and cry til he asks what's wrong and then tell him. 4. asking things like, "do you love me?" "do you care about me?" and then ask, "then why are you cheating on me?" I'm open to all suggestions. Just to make advice-giving a little easier I'll tell you that it's not an "affair" per se - apparently he's just been sleeping around sporadically. I really don't want to lose him... but I know that sometimes you have to do things you don't want to do. Thanks in advance!

• Answer:

  1 - No don't do that.. doesn't really show that you're seriously upset about it 2 - Yeah maybe 3. Maybe because then he'll understand how bad he hurt you & hopefully it'll make him feel like crap 4. No because he'll probably just say of course, blah blah blah & make up an excuse