Not sure what to make of him...your input plz!!! 18+ especially!?

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 kept it platonic (tho he tended to tease/flirt often), 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 then asked her if i was mad. She said I didn't care. We talked tons (4+hrs) almost every other night online for a month. 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. Once on IM, he even went off about how "girls should be straightforward". Lately (yesterday & today included), he keeps texting me, like "how many pgs is our hw" or "did u do ur hw?". He could look this up easily! What's up?