I have a bit of a problem, I'm not sure where to start and I'm not sure if anyone will be able to give me any advice. Basically I can't seem to initiate anything properly with any girls I'm actually attracted to. Over the years I have come to realise I can put a lot of the suggestions mentioned on this sub into practise from the get go but it seems I can only do it with girls I'm not attracted to or really care about I.e I can be quick witted, make them laugh, talk about sex and for a lot of them it has worked and they seem to want more but I'm never that attracted to them so I never follow through.

Unfortunately, as soon as I come across I girl I actually find attractive I become somewhat socially awkward, I can have a normal conversation but nothing like what I'm able to do with these other girls, I suppose I worry they'll find me a creep.

How can I change this and be able to engage with attractive girls the way I know I can? Most will say 'just don't give a fuck' but that's easier said than done. I'm meant to be going to a friends birthday party where I will only know about three people in a weeks time and would love to be able to talk to some girls properly there.

Edit: I have read the sidebar in all its entirety.