HELP! Do these signs point to more than friends?

There's this guy. We have been friends for months now (but he is in a volunteer program & not allowed to date for a few more months). He texts me a lot, Facebook chats me always, hangs out a lot, and all of my friends think he likes me. I think I've made it pretty obvious that I like him, but we've never talked about it. He definitely flirts with me, but is more reserved when he's around the other guys in the volunteer program (because he is not supposed to be getting involved with women). About 3 times though, he has turned me down when I asked him to hang out. I can't figure him out. Today, I had to go to the ER. When he found out, he immediately offered to take me & sat there and waited for me the entire time. He was incredibly nice & kept trying to make me laugh. He said when I had kids they were going to be so lucky & also that I would love his grandma (who is incredibly important to him) and that he wanted to introduce me to her so bad. I really like him, but I can't tell if he thinks we are just friends. Is he just being a good friend by taking me to the ER? He's introverted so I know he values deep friendships, that's why I question whether ours is just that? What should I do! Does it seem like he likes me as more than a friend??