should I stop worrying so much??

Haley
So the other day my boyfriend was in the shower and he told me to text his mom back for him. I did but I was a little curious so I went through the rest of his messages. I saw these messages with another girl named "Anna Banana😊" in his phone from the summer and I wasn't exactly happy about them. We spent the summer apart because he's from Idaho and I live in Montana and at the end of summer we got an apartment together in Montana. I didn't think I had anything to worry about while we were apart but now that I've read these messages with this Anna girl I'm a little worried. According to the messages they talked and hung out everyday. He would always text her in the morning and ask what her plans were for the day and they would end up meeting up later. There were a few messages from him asking her to pick him up because he had too much to drink and there were a couple messages from her like that too. They even texted I love you to each other 😭 I don't know if I should confront him about it or just leave it alone because it was only a summer thing and I don't want him to know that I snooped through his messages when he asked me to just text his mom back. 😔 please help!