Ignore these boys.
One day when you are having a good conversation with him with flirting, etc., just say to him the following in a fun and flirty way:
"What do I have to do to get you to ask me out?"
You write, " i want to ask him out, but before that i have to get little intimate with him". WTF?!?! You are supposed to be intimate AFTER you are in a relationship, so I am guessing that you do not mean *physical* intimacy, right?
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?