Not drinking at house parties?

So I've been invited to quite a few house parties recently - the thing that is bothering me is that I don't drink which makes it very hard to do anything other than talk to girls.

If I started to kiss a girl or anything further, this would be deemed as 'taking advantage' - what should I do? Obviously I want to get some action at parties but it's really hard if you're not drinking as you immediately get crap off people.

Cheers.

it wouldn't be taking advantage if shes up for her.

you didn't make her get drunk did you?