this jerk...

So yesterday I told my boyfriend about how I'm happy I'm moving forward with my life after an abusive relationship. I finally gained confidence & got over my jealous issues. I let him know this yesterday and what does he do? He goes out the whole night with his "friend" he did tell me he was going on a "date party" but I told him it made me feel uncomfortable at the time.  Well anyways, the whole night he posts pictures with the girl. Some of them in his room and others of him hugging her.. he texts me this morning saying "I had the best night ever! My date & I went to the bar.." I'm so mad right now.. like I told him my trust was getting better and he does this to me.. he says they're just "friends" but still.. I feel so hurt :/