I am thinking about kissing my gay friend so he is more likely to allow me to borrow some books
What is causing you to feel that way?
I really just felt like kissing him. He is my friend so I assumed that he would understand.
If they like you and you like them it's okay to kiss. It's got to be felt by both of you.
It's a simple kiss. I'm not marrying him I just want to borrow some books from him.
Well as long as your friend is into it then it should be fine. Just be sure not to force yourself onto your friend as that is not a fair thing to do.