yo
first time ive posted on here but iv been reading for a while and picked up some pretty sweet tips.

ive come across something which i dont know much about though; i'm keen to have a crack at my best mates sister. i'll give you guys a bit of a background on the situation.

Shes 18, I;m 21. I've really only ever spoken to her in person a couple of times when ive been at his house, a few fb posts here and there. Sometimes it seems she is showing interest but then others it seems not at all.
My mate gets really fired up whenever she is mentioned which is a bit of a worry although he has fucked some of her friends (including her best friend) which she doesn't know about.
lol the other night I got home after a big night and "like"d one of her fb profile pics so I'm sure that's a dead giveaway that I am keen. Haven't actually spoken to her since. I was over at his place today having a spa outside when she walks out with bikini on to sunbake when she was well aware that I was out there however I didn't want to start a convo with him right next to me
Thought on her doing this?

I'm just not too sure how to approach the situation? Would love any help!

anyone?