Is this guy interested, possibly?

There's a guy in my class who I sometimes catch looking at me while I'm working on my stuff, and when I look up we have eye contact. This has happened at least three times. I know, it's possible that he may have simply been looking at me without being interested, but maybe not. I don't know, which is why I am asking this.
This guy has talked to me before, but I was feeling kind of nervous overall that day and I just sort of ignored him without really meaning to (I know it doesn't make sense, but that's the best way I can put it); since then he hasn't tried talking to me, but still looks at me.

I know it's hard to tell since no one on this site can actually this guy's behavior, but based on what I said, do you think he might be interested at all?
Is this guy interested, possibly?
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