First of all, I get aggravated when guys nitpick "Ohh she has cottage cheese thighs" blah blah, fact is 98% of you would hit that, and that's all that really matters.
Just imagine her picking her nose and eating the boogers. I saw a SHB doing that in the movies a couple weeks ago. It was DISGUSTING.
Also, read GWM. It will help you. Imagine the girl sexing you when you talk to her. It will get you into the proper state.
As for the amogs, just befriend them. You can tool them if you want, just be subtle about it. Try to isolate her in an area where it will be hard for amogs to bother her. Like a 2-seat couch. If the amog is obviously a loser afc/ugly as hell or whatever, then do her a favor and "rescue" her... "Hey, HB, dont I know you from somewhere? Wow its been SO LONG SINCE I've seen you!" Extract from the amog and isolate.
You have to realize (as you say you do, but INTERNALIZE THIS) that there are millions, if not BILLIONS of chicks that are just as hot or hotter than she is walking around everyday. She is instantly replacable. Once you get good, hanging with chicks of her looks calibre will no longer put you in an unhelpful state of shock and awe.
You just want to be relaxed and be in a sexual state so that she feels the vibe and matches you to be congruent. Once that happens, there's not much more work to be done