I like this guy but does this guy like me?

so i like this guy alot, but idk if he likes me. we talk every day all day and at night we are on the phone from like ten to 4am. we laugh and understand each other. we have been through the same thing of things like with his mom and my dad leaving and so we understand each other. but we've been talking for like three weeks like this and he still hasnt asked me out. i dont talk to any other guys cause i dont wanna mess it up. my question is how can i get him to ask me out? we like real all the time so im always myself when im with him. someone help please