Should I be mad at my boyfriend?

Me and my boyfriend are both 16 well, yesterday (Friday)I received a text in which he meant to send it to his guy friend saying that he was going to a party and "All the girls are going to be there". Now I believe it was some type of reunion party, since he hasn't seen most of them since elementary or middle school. Instead, he was suppossed to come ovfer at my place at around 5 or 6, but because I told him I was going to my mom's doctors' appointment I believe he misinterpreted that. So he went to the party and later that day, a girl by the name of Monica requested me on MySpace and I added her. We started talking and she informed me about the party because she was there. She witnessed her drunk friend (Veronica) hitting on my boyfriend but he refused the alcoholic beverages she was offering him because he refused to drink since he promised me he wouldn't. Also, Veronica told Monica that she wouldn't stop hitting on him until she gets him in bed. So I am watching out for that, but the reason I am mad a him is because I suffer from depression and I am suppossed to go out and have fun instead of always being in my apartment that I've called home for 16 years. So guys/gals, please I am desperate, should I be mad at him?