Thank you, Bant and Mumfun.
I've been really busy since I posted yesterday morning!
I went out with him yesterday afternoon too. I still don't know! I have told him that I like him and he's said that he likes me too and that I'm lovely, but I don't really know how to ask him or find out if it's anything more than friends. I know a lot of people will say that it shouldn't matter and just get to know each other, but without knowing the parameters, I won't be able to interpret anything and it will just become stressful.
After I left him yesterday, he texted to tell me that it wasn't the same without me there and that he missed me. We have texted quite a bit today, just the 'nonsense' "how are you" "what are you doing" type of thing!
And you're right, flirting won't help. He wouldn't understand it. We are fairly tactile with each other, considering. We hug and he's put his arm round me a couple of times when he walked me back to my car. But I don't know if that means anything.
I know that really I just need to come out and ask him but I'm not sure how to do that/how to phrase it. I'm also conscious that he's a bit younger than me. I have no idea whether he'll have even considered it because of this!