what does this mean?

Ok so yesterday my boyfriends friends sent him a group chat on kik. They sent him a picture of a gaming thing with usernames and a girl. Which my boyfriends nickname was on there. They told him is this you ______(nickname)? he said yea but it wasn't he was just messing with them. So they said damn she's fine not my boyfriend but then. Then they asked my bf do you got her number she's hot. Which my boyfriend replied "not for y'all." I got mad am I over reacting? I feel like he shouldn't have said it in the first place. He knew I would've got mad. I'm the jealous type gf and when I saw that I got pist. Like to me it's nothing to play about. Guy talk or not he would of got mad too.