Guys I need your advice?

Im gonna make this short and sweet. I have a neighbor that I kinda like. Normally Im really good at reading signals but i can't read him at all. He is very nice and polite. When Im with my mom he stops to talk and mostly look only at her. When Im alone with him we talk on the elevator ride up to my floor and not much more but if my mom was there he would stay to talk for a while. My question is, is he acting like that cause he is shy and like me or is it more that he doesn't like me and thats why he is in a hurry?
Guys I need your advice?
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