Does he want something else?

I live inside the university campus where I study, and I've met this guy, Matthew. He's my classmate since the first semester. We live in the same building, a few rooms away from each other. He's 1.7m, just like me, but has a californian guy look. He was an athlete in high school, so he has the kinda muscular body, tanned skin, dark blonde hair, about 60-65 kg, bigger than me. I'm more the nerd guy look. White, dark and short hair, about 55 kg, thin, not exactly fit. So, when we first met, I thought he was just a popular asshole, who'd never talk to me. We got closer, and once I asked him if he was gay. Not a big deal, but the way he behaves makes you doubt it. He got nervous, seemed offended and told me stuff, that it was not anyone's business, he was straight and we didn't talk for a while. As I was just letting him say it, about a week later I apologized to him about what I'd said, that it was a ridiculous question and so. Later on, about august, I wanted to get back in touch, and sent him a message, apologizing again for my what I'd said, and on october he wanted to talk face to face and apologize to me about his attitude. We then got closer. He sits now in the table next to mine in the restaurant, not exactly togehther. We've been chating a lot (I'm trying to show interest), talking about random stuff, sometomes getting personal, talking about porn. He then invited me to watch a film togther, me and him only. I agreed. He then started to visit me almost every day at work, even if it means he has to leave his own job (we work a few rooms away, both at the college building, but in different departments), and once we were talking about exactly this, and I joked that he visited me just to get free candy (my department gives it for free), not expecting he'd respond "actually I come to see you". I melted inside but laughed while he left the room to do something at work. He makes me feel good, I like being with him and I think both of us enjoy being together, alone where I work, eating at the restaurant, running in the rain while going to class, chatting about everything on WhatsApp or whatever. I'm never sure of things, if he says all this just kidding or if he likes me, which is what I think (or want to think) it is. I'm asking you guys what you think. Is he just being nice, wanting to be my friend, getting closer, or he wants something else? Any option is ok for me, but I'd really enjoy being his boyfriend.