There are obvious signs which let you know that a guy likes you. Guys are very expressive in this regard. They normally like to show what they feel. As he has told you that he wants to be with you all the time and is always there at your house, this means that there is something serious. I presume you guys are good friends so why not play it in open and ask him directly that since he is hanging around all the time what are his actual feelings.
