I understand we're not here to fight and I myself am pretty useless in a physical confrontation.

This girl definitely showed IOIs but she has a boyfriend she's been seeing for a little less than a year. He first boyfriend too. The last I saw her was about 3 weeks ago but I kind of told her along with my other groupmates (obstacles) that I'll be contacting them any time this semester for a small reunion.
This is the type of guy who tries to look tough while he's around his woman; might be a little bit inscure based on his body language. We were doing a reportand she borrowed a projector from this guy (he might be a provider type). When she introduced me I was like: "Hi!" and he only gave a rather unfriendly nod.

I'm very much hoping the AMOG won't be around when I do contact them. My question is can I sarge IF her AMOG boyfriend comes along? Or do I create opportunities for isolation? How do you reverse cockblocks in this type of situation? Or do you think I should try and earn the AMOG's trust then wait for an isolation?

All comments appreciated!

Call me a stick in the mud, but I leave women with boyfriends alone. Better to use them as a resource to meet her single friends than to start a dramatic event for one girl. I also think it is a little silly to believe he is insecure and just being an AMOG jerk when it is very possible that he saw through you and realized you are hitting on his gf. As the old saying goes "it isn't paranoia if they are really out to get you."

That being said, your use of pua lingo and terminology suggests that you are going to ignore that stance and go ahead with whatever advice people give you. I will just say this: be prepared for backlash. If it just turns out this girl is flirtatious by nature (not exactly rare) you will look like the ass for trying to break up a relationship so you can get laid. My 2 cents