Dash Riprock
Master Don Juan
Agreed.Total 100% disrespect dude.
Never be afraid to cut toxic people out of your life & your mate is definitely not your mate, he is a snake.
At this point and don't see how your girlfriend can be trusted either.
Might be an idea to cut them both out.
Your "friend" is very disrespectful. Making jokes at you in front of her is bad enough but the over-flirting is also a d*ck move. If you confront him, even in a plain, clam, non-accusatory tone, he'll likely grin and laugh and say you're over-reacting yet he knows exactly what he's doing. Guys like this really piss me off. Though I can't recall being in a situation like this, it would piss me off big time. I assume your friend's girlfriend was in the room too so it's also disrespectful for her.
If it were me, I wouldn't say anything to him or your girlfriend but I would go silent for a while to him. If you bring it up and especially if you get overtly pissed, you do risk looking insecure and jealous which aren't admirable qualities. Plus, then he and your girlfriend know he got to you and that you can't keep your cool.
Sometimes SILENCE speaks louder than words.
Let us know how it turns out.