Should I forgive him?

I'm not so sure we should be answering this question.

Granted, this is in the realm of what is discussed on this site, this seems like one of those things a person needs to answer for themselves and either take a risk or leave it be.

It's possible he had feelings for his ex. Having gone through basic right out of high school, I remember how the drill sergeant's mind games were. They are trying to mentally prepare you for if you are ever captured by the enemy, but as a fresh to the world kid, it can have that effect of making you feel like child. When we feel like a child, we act like one.

Yea, he probably was acting like a child when he tried to re-convene with his ex. So if you want to forgive him, go ahead.

I will make one suggestion. Don't go to him. He made the mistake, he needs to account for it, and be the one to approach you. He needs to show that he is sorry for acting out of character and also be him communicating with you first, it shows that and also that he does want to make it work with you.

Good luck!

I think you should forgive him you guys didn't have a relationship right? So its not like he wasnt allowed too

Sounds like Adam still have strong feelings for his ex. That's very normal. I think it's good to take some time to think about what you want. I think it's good to forgive but I am not sure if you want to try to make something out of it when he comes home. I think it will be good to talk to him about how you feel once you figure out what you want. Would you be willing to be with someone who cannot let go of his past (ex) and is indecisive?