So over the past 3 weeks I've gotten myself a fuck buddy after a brutal 2 month dry spell. The regular sex is very welcome, but that is all it is. We've talked it over many times and agreed we're okay with just a physical relationship without any commtiments.

So now last night I go out to this cocktail party and meet this really cool girl who I get along with really well, but at the end of the night I find she has a boyfriend. So I called up my fuck buddy for a booty call (4.30 am at this stage) and she comes to pick me up. I spend the car ride home (friends were in the car too) talking about how I missed out on this girl because of her boyfriend.
Once I get to my fuck buddies house she tells me she's become attached and wants to date me. I told her I'm too drunk to talk about it now but when I sober up we'll talk. So how do I tell her that I want to keep it as it is. I don't want to hurt her, nor do I want to lose the sex, but above all I don't want a relationship right now. Is there anything I can say that will sort all that out?

Just explain to her that you enjoy the relationship as is. Let her know that you need more time to get to know yourself and what you like before you remove yourself from the market. If this doesn't work out, dump her.

Tell her you're already seeing someone.
<3

Viciously attack her.

As soon as someone gets attacted and its not wanted by the other party it has to end. Coming from being on both sides of that problem, it really is the best thing.
So you really don't have any feelings for this chick at all? Be sure when you do it, and for fuck sakes, when you end it - end it! Don't go back for anymore because then your'll be really fucking with her head and that's not cool :(

She's right. If you want to continue to fuck her you have to give her some false hope, and drag it on as long as you can. Find someone new, and terminate her.

My advice isn't good because of my morals...

I've added something to what I said earlier on msn. Check it when you read this.