Do you think he likes me?

[Tash]

So, a few weeks ago this guy joined drama club. We sat close, as he knows my best friend. About a week later, we added each other on Facebook, and I got his number the other day. Here's the signs I think he likes me:

-he texts me/Facebook's me almost everyday.
-keeps the conversation going for as long as possible.
-is upset when I have to go.
-one time, we joked we weren't friends anymore, he said 'we could be more than friends..'
-he walked me half-way home with a couple of my friends yesterday.
-he's a bit flirty, saying texting things like 'you're such a nice person ' 'you're beautiful!' etc.
-starts the conversation
-asked me if I've got a Valentine's date

When we see each other in real life, he's a bit shy, but looks me in the eyes when we're talking.

Does he like me? I don't know wether to flirt back etc, because I don't want to be hurt again

P.S we're both 15.