Help! My boyfriend might be cheating on me!

Okay so last night I used my boyfriends email for something because I forgot the password for mine. I went to go check it. The plan was I was just going to check what I had used it for, but than I saw an email that caught my attention. It was from booking.com and it said something along the lines of “Your booking is confirmed”. I was very confused as he had not told me ANYTHING about a hotel. To give you guys some information to make this make more sense. My boyfriend is in the military. He’s currently stationed in Camp Pendleton. I’m currently in Florida. We haven’t seen eachother in 5 months. The next time I see him in person will probably be in 2 months. We do talk pretty much almost everyday though. He usually will tell me what he’s doing . For example, If he’s gonna go out to dinner with his buddies or go downtown, or so I thought! He booked this hotel from May 31-June 2. As I’m writing this it’s June 20th and I just found out. He booked it in San Diego which is about 45 minutes away from where he is. I don’t know what he would need a hotel for. It doesn’t make sense. The details say it’s for 2 adults and 2 children.

I’m very confused. I don’t want to jump to conclusions, but I need advice. I don’t know if I should call him and confront him about it or just keep it to myself and hope that he wasn’t doing anything bad. I don’t want him to know that I was swooping through his email though. I have so many questions about it. I just hope I’m not getting cheated on. Let me know what you guys think. Thank you.