Affiliate Marketing Secrets

I’m with my bf for 8 months now. I’m 21 and he is 30. He is kind of quite person. He usually don’t call or text someone unless he really need to, except some people that are really close to him like me, his sister, and his best friends. Yesterday, I used his phone and I saw a conversation between him and a girl at his school. They talked about school, teacher and some other things too. He told her that how good she did on her presentation that i don’t think he usually do to other people. He even told her that he got good grade first before he told me about it. I watched a good movie with him, then he told her to watch it and they talk about how good is it. They also talk about he is a good cookies maker and she is a good cooker. He even told her that he know a market that sell good bread and said he will take her there sometimes if she is good. 🙁 Do you think this a friends’ conversation? I think it would be ok if she is his friend for a long time. But they just know each other 3 month at school, and i know how my bf is… he is kinda quiet and don’t usually talk to people that are not close to him. I don’t know what should i do now. Should I ask him? Or should I just keep an eye on it and find more proof before asking him? I know I was wrong when I went through his phone without his permit. But I was insecure. Please help!!!! 🙁
We have no problems. We love each other and I can feel his love for me. He care for me and want me to be happy all the time. We always have good time when we are together. We hang out almost everyday on our Spring Break. He also tell me that there are some girls at school like him and try to talk to him. He said he doesn’t like it because he doesn’t go there to find girls. He seem honesty about this. There would be nothing if i din’t go through his phone. Maybe I’m just too insecure.
I didn’t ask him clearly about this. However, when he told me about some girls at school like him, I asked him is there any girl that he talk to more than other. He said not really. Then I ask do you think it’s right when you go out with another girl/guy when you already have a gf/bf (That girl or guy wasn’t a friend for long time)? And I told him I think it shouldn’t happen because it will make bf/gf sad, and he said he agree with me.
I think that I’m just over thinking. Maybe I should trust my bf more.
Thank you for all the answers!