Should i of been mad?

Yes u should have been mad!! For him to even disrespect you by giving you away to his friend is enough said. And unless this alexis has been a good friend of both of you for a long time, he's a creep for flirting with her. My husband and I ave a good friend he dated in high school (we are 36 and 43 now) and my husband will joke like that with her from time to time (she has a new set of huge now) but its all in fun because we trust eachother and know its in fun. This doesn't sound all in fun to me though!