Hi I've been seeing my fiance for 18months and we got engaged 4 months ago,but after we'd been together I found out that he had been seeing another girl for the first three months of our relationship as he hadn't ended it with her when we first got together, but I decided to stay with him but as we live three hours away from each other I don't see him as much as I would like and I do get worried that he's cheating.when he was with the other girl he wouldn't let me look at his phone,so now he let's me look at it to prove he's not cheating but he won't let me look at his phone bill and lately he has been 'losing his signal' more than usual,and now I'm worried that he's got something to hide.he said its just personal family stuff as he is trying to get in touch with his sister but I don't know whether to believe him.he said hed marry me next week if he can afford a registry office wedding to prove I'm the one he wants (I didn't ask him to) and he was really lovey with me,and when I was getting upset he was crying too as he said he didn't want to lose me.
Should I believe him?