<human>: I think my boyfriend of 1 year is cheating on me. I don't have any concrete evidence but I keep feeling like he's hiding something.

He's always been weird with his phone. With everyone really. He doesn't like anyone going on his phone. He used to let me take pics on his phone and play games but now he won't let me touch his phone at all. He kind of hides it when he texts and I think he may be texting someone that he shouldn't be.

I basically live with him. I'm at his apartment almost every day and sleep over every night. He's the nicest boyfriend I've ever had and does basically everything I ask. When we are apart he's not really good with showing he loves me. He's the slowest texter (takes hours to answer anyone's texts) and rarely calls me.

When I do bring up that he's being distant and that I think he's cheating, he apologizes a lot and says how much he loves me and that he would never cheat on me. I believe him sometimes but other times I don't know what to believe. I've been cheated on many times before so I think that's why I'm so paranoid. 

This weekend he is going to visit his mom (it's a 3 hour flight there). His ex girlfriend lives in that town and I'm kind of nervous something could happen. And if nothing does happen I don't want to look like a crazy girlfriend asking him if he's a cheater. Any insight would be appreciated.

Can you give me the gist of the text in a nutshell?
<bot>: I think my boyfriend is cheating on me although I don't have any concrete evidence. I've brought it up to him before but he convinces me he would never cheat on me. What should I do?