Why do they keep doing this?

Well i have a crush on someone from my class. Its been like one year. Someone told him that i liked him. He really seemed weird when talking to me like i was forcing him to talk to me. It was like so difficult to talk with him and he seemed he didn't like me and i didn't want him to believe that i like him so i just stopped talking to him. But now after the summerbreak he talka to me normally and laughs to my jokes (he never laughed at my jokes llast year) when im with my bestfriend he always talks to her and we somehow end up talking with him. But he always starts with my bestfriend. When i do my homework for tutor at school he always comea and helps me. My bestfriend is taken ans he knows it. Whats going on? Does he like my bestfriend or something i just can't understand

Why do they keep doing this?
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