A couple things here. I just went through a similar situation. First off, tell him to get rid of the phone he as with her. If he wants to be with you, thats a must! Tell him if he wants to talk, they can do it through email, which im telling you for a reason, to set him up. Does he get on the internet? if so, for 70 or 80 bucks, you get "pc pandora" IT WORKS GIRL. I have it. Ive tried everything, then i found this. now i have my bf's email password, and see pictures, key strokes, everything on my computer at anytime i want to look. If you need any help with this, let me know. I have literally become like a private investigator because of my bf's lies, cheats, everything. I can find anything out about him now, and just about everything he does.
good luck, if you need me heres my emal firstname.lastname@example.org