He calls me just to say hi

Ok.. so there's this guy i've been hanging out with. He complimented me and he is handsome too. We made out. I haven't seen him in like 3 months. But sometimes when he'd call me, i'd ignore him. So he started to call me like once in a week and whenever I don't pick up, he leaves a voice message and says I just called to say hi. I mean if he liked me, wouldn't he just ask me out? or is he just playing with me? and he's much older than me. at the beginning he wanted to ask me to be his gf, but he feared the age difference. Ok so why does he still call me anyways if we can do nothing about ourselves. Im 18 soon, but I don't think a guy could wait. Anyways I still like him, really like him, but his actions with calls are getting me crazy. does he like me or not?
He calls me just to say hi
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