So my boyfriend of a year just broke up with me. He told me that he didn't want me to waste the next year on him due to him leaving for basic training. He broke up with me on a Wednesday and I found out last night he fucked a girl Friday night. I don't think he knows that this girl has just got an std from this guy about 2-3 weeks ago that she slept with. Should I tell him? Or just let him find out on his own.