Does my boyfriend not like me or does he just need some space??? x?

I have been going out with this boy for 11 months now and it feels like we are getting further and further apart. I have tried talking to him but he just says that nothing is wrong. Every time I ask him does he want to come out he says that he is busy... is he really busy or is it just an excuse?? x He lies to me aswell.. . when I asked him the other day could he come out he said no, said he was at his cousins house doing homework. When i asked what homework he ignored me. Later on that night when I was out with my friends, I saw my boyfriend mucking around with his friends, when I asked him the next day what he was doing the night before he said that he wasnt out, that he was doing homework! :/ this is really bugging me... Does my boyfriend dislike me or does he just need space???? x