Boogie said:
Well, too late now, ain't it?
edit: and "building momentum" is precisely where I have difficutly. My "momentum" always peters out after a short time. and I DO get nervous.
You get nervous because you care. Why do you care? Because you're already picturing yourself having sex with the girl.
But WHAT IF she's secretly a bitch? What if she's only into picking flowers all day? What if she wants you to be a slave to her and pick her toenails while you cook her dinner?
What if you two literally have no compatible personality traits aside from the fact you think she's hot? Turn that feeling off because the girl could be a nightmare, and most girls stop caring about a guy's looks by their early 20s, no matter what they say.
So all of a sudden, this girl who you're getting nervous about the prospect of sex with is not thinking the same way, because even if you're good looking, looks mean almost nothing to her, they're just a bonus.
Any bad personality trait she displays should have you tease her instantly. "Oh god, you're a complainer!" Most girls are going to instantly treat you like their girlfriends unless you put the kibosh on it RIGHT AWAY. And if the girl starts mouthing off you have a right to mouth off back, walk away, or continue joking. Let her know YOUR rules. Never waste time on time wasters.
You're the man, and while you don't have to take it to a caveman mentality, you have every obligation to make her know that you are the man!
I'm currently dating a girl I have no business being with, simply because of the fact that I don't take shit or lousy behavior from anyone. The night I met the girl, I was invited by a friend to her party. That night, I downtalked, in a joking but serious way, a good looking 6'5" bouncer dude about a bunch of topics and didn't waiver for a second. I'm 5'8" and 140lbs. After that I teased her all night about her dumb insecurities and complaining until I guided her into the kitchen and started making out with her. She's absolutely stunning. Had I backed down and not been stern, funny, or shown my personality completely and totally, I never would have heard from her again, guaranteed.