re: Cant stand this guy in my new GF's social circle

The first and only enhancement you need to make is to stop worrying about enhancements to make

You talked in your OP about doing alpha shite, you know what alphas do in these situations? They don't let themselves get psyched out by their girlfriend's guy friend. If the guy friend is annoying when everyone's hanging out, they just talk to their girlfriends instead and keep the girl's attention focused on them instead of the guy - and if the girl blows them off then like I said, they bring it up afterwards and handle the problem responsibly, like an adult.

Just be you and stop worrying yourself with this guy. Your girlfriend is dating you, not him. There's a reason for that; act like it.