would it be alright to hav sex with a good friend which you have known for ages cause im liking her more than ever now but i dunno if she feels the same.

Your friendship would be ruined if you did. No question about it.

oh that sucks cause shes hot, im just gonna tell her that i like her anyway, if she said no would she still wanna be good friends with me? or would she be like "what the fuck"

Watch "when harry met sally", and all will be explained.

righteo ill have to hire that one

Hmm, Harry and Sally ended up falling madly in love and getting married. I suppose that can be viewed as "ruining a friendship".

My best friend told my other best friend that he liked her and they were very close friends to begin with. They have been going out for 2 months now, everythings going well. I think you will be okay telling her that you like her but by all means don't tell her you want to have sex. That will just freak her out big time.

My sister is goin' out with one of her friends.

I think it shouldn't make too much difference.