I can't tell if this guy likes me or not?

[madison]

He's a senior, I'm a sophomore. We don't know each other too well, but he's a good guy. Friday at a party unexpectedly bear-hugged me to say "Hello". After I'd gone home, he texted me asking when I'd left, and said that I should've told him. Saturday he had me and my two best friends over to his house to hang out with him and his two friends. When I had to leave, he walked me to the door and again hugged me, and texted me saying "Come back". Sunday I'd texted him first just reminiscing over the previous day at his house. The conversation was short and I'd ended it with "Haha yeah" hoping he'd initiate the conversation. I haven't talked to him since Sunday. His texts are mostly relatively short and often seem emotionless or bland from my point of view. Is that a typical guy thing? What's his deal. I can't get a sense of whether he's into me or not.

Also, I know it might seem stupid, but I recently followed him on twitter. He accepted me, but didn't follow me back. Does that mean anything in the guy world?