What does it mean if your guy friend seems to LIKE like you one day, and just as a friend the other???

So I met a guy 2yrs ago, and we have become really good friends. 1yr ago, I started liking him, a LOT. I think he may have caught on, but we both kept it platonic, since he had a gf he loved. We just studied & talked a LOT. 2months ago, the gf broke up with him. Well, my friend (against my choice) asked him the day after if he liked me, and he paused a while & said as a friend. I wasn't mad, & we talked tons (4+hrs) almost every other night online for a month. Grew SO close. I go back to school and he is blushing around me, staring nonstop, and I get home and he texts me TONS, and even called me once to talk. So, I text him back some, and call him too. But last 2 weeks at school, it is only staring & awkwardness. Once on IM, he even went off about how "girls should be straightforward". Yesterday I texted him, and we went back and forth for a while. He wasn't really flirting tho. Does he LIKE like me? Or does he like me cause I like him? It seems he likes me one day, and not the other!