Is he interested or not?

Ok so this guy asks me for my number. We text and everythings cool. He used to text me good night and good morning every day when we didnt talk in person. Now that we talk in person he never starts a conversation. The first day we truely talked in person, he kept making eye contact and trying to talk to me and saying how i was nice. I didnt flirt much with him just some eye contact,but i didnt really respond to much to him. THat day i left earlier than my best friend and she told me that he was trying to hold her hand and that he put his arm around her but that he was doing it to get her stalker "jealous" the nest time i saw him (today) he made barly any attempt to talk to me he just talked to my best friennd and he shoke her hair with his hand a couple times. Than when me and her kept talking he left..what could this mean?