He he broke up with his ex girlfriend a year ago (ish maybe more) they were together for four years, it was very serious, the were getting a mortgage for a house etc but she cheated on him they broke up and then She got with the guy for around 6 months.
the other night she sent him a snapchat, it was of her with no top on. He told me about it pretty much as soon as I got there. I think I may be slightly over reacting as the previous guy I was seeing a year ago left me to get back with his ex, but I felt when he spoke about it he looked sad, I wasn't sure how to react or what to say, it doesn't make me angry but I feel a little worried? Stupidly! Do I approach the subject or not, he also hasn't been so talkative to me since like he usually is?