So I just flat out asked a girl who is a friend of mine to make out. It was after a long night of bonding, secret sharing about ex's and funny enough my delving into pick up. Flash forward we ended up giving each other oral and we hung out a few days later like nothing happened.

It went something like this.

me: "insert name here I really want to make out with you right now." she starts laughing me:"No I'm serious you're attractive I'm attractive no feelings involved just fun."

Her:"But it's you, you're like a little brother to me"

Me:"Haha that's cute, but who cares we should still kiss you're looking very pretty tonight and I want to kiss you."

Her:"Alright fuck it lets do it."

And bam straight to making out. It was nice we were giving each other pointers, then I progressed further she pushed away. I whispered in her ear. "I'm going to eat your pussy." And then she returned the favor. Three days later we hung out like nothing ever happened.

I'd like to sum all this up with. If a girl thinks you are friends NOTHING MORE... then you should be able to explain that in times of sexual frustration that a little making out is harmless... This is of course you actually have feelings for her in which case you'll either make it worse for your self or giving her a reason TO be attracted to you. Just don't make her feel like a slut or just another girl. Treat her like a friend.