well ... PERSONAL EXPERIENCE . but my previous bf was in fact a cheater . we would talk ALL the time and then we broke up for like three days . about a week later he never talked to me , and I found out he was cheating on me . JUST SAYING .
but , what I think is actually happening here might be because he's playing hard to get (if you guys just started to go out-maybe he just needs to get to knw you a bit better). or he could just be shy or maybe he just doesnt know how exactly to approach you . maybe he's not used to it . call him and be like "heyy , I just wanted to talk about us . you know how we never talk ..." and so on .
wish you the best ! hope he's not cheating !