Why does he delete his messages? Relationship advice

I am 19 years old and have been with my boyfriend for 4 years now. We moved in together in February. He has a hair stylist that he has been going to for a year now and I don't really dig her much. He started text messaging her when he wants to get his hair cut which is about twice a month. When we first moved in together I got on his case about texting her late at night and we got into a fight over it. We are the type of couple who never fights but this girl just pushes me. So anyways a few months ago I think in May I was going through his messages and I noticed that she sent him a picture but it wasn't downloaded yet. So I checked again the next day and he had delete the picture. I really wish I would have downloaded the picture to see what it was but now I cannot stop thinking about it. I want to tell him that I know about it but I am worried he will be upset with me and end up breaking up. This isn't the first time he has deleted their messages I read through them and they didn't make sense as if he deleted parts of their conversation. What should I do should I confront him about it? It keeps eating at my not knowing what that picture was and why he deleted it? He still goes to her for hair cuts. I am not really worried about him cheating because he doesn't have time he works 65 hours a week to support us while I finish school. What should I do or tell him?

If he really loves you he would be honest with you and he wouldn't have a problem showing you his messages so you would feel better. You should tell him that it's fine that he sees the hair stylist or talk to her but you can't shrug off this feeling that he's hiding something from you, so you would appreciate it that he doesn't delete messages and lets you see his phone anytime so that you would be convinced that you were wrong all this time, and that you cant take his word anymore because he keeps deleting something that he obviously doesn't want you to see..

Hey KQRAYZIE, Hope you are well. I read your post and wanted to reach out to you. I think you should address this issue with him regardless if you feel threatened that he will be upset and may break up with you. You shouldn't have this fear at all. Honesty is the best policy so if he is hiding stuff from you, you should definitely have a conversation with him. You are the one with the power. You choose your partner. You deserve honesty, respect and happiness! I noticed that you are 19 years old and have been with him for 4 years now. You have a lot of things to experience in life and know that you are just at the beginning. So please, put yourself first and don't worry about the outcome. Things happen for a reason. You deserve the respect and honesty. Good Luck!