What does it mean when a guy walks by and stares into your eyes, while smiling? Would he be interested?

There’s this guy I noticed in my university 6 months ago. He’s extremely attractive, but I thought well I’ll never get to talk to him, since it’d be awkward randomly walking up to him and starting a conversation. Now it’s my second year at university and I realized that he’s in my department and is two years senior to me. After that I saw him across the room at the university cafe and was talking to one of my course mates (who I don’t really talk to) and then it looked as though he was looking at me.

Later on, I talked to him at this networking event. Though I’m rather quiet when I meet people for the first time, so I didn’t manage to say much besides where I’ve lived (which he commented on and asked me questions about). Then he cracked a few jokes, which were rather funny. He seems like a sweet, goofy type of guy, which I’m into. Plus, like I said he is extremely good looking and all these girls were crowding around him, some fanned him. So yeah, he mostly talked to whoever was talking to him. And this one girl commented on how he is getting so much attention since he’s so attractive (he was turning red, and said even he feels embarrassed) and to that he replied that she had a boyfriend so why should she mind that he was getting so much attention. So after a while he walked away to chat with his guy friends.

A few days later I saw him walking past me and this loud obnoxious girl who I hang out with (who talked to him at the networking event too), and I pretended not to see him (though I doubt he saw me see him first. But then, when he was 10 meters away she noticed him, squealed hi and waved, so then I thought I better say hi too otherwise I’d seem like a freak. So I turned my head towards him and waved with a smile. But when I turned he was already staring straight into my eyes and smiling. Which I thought was rather odd, since he didn’t know I’d see him and say hi, and he was staring at me instead of at the girl who was actually saying hi.

So my question is, assuming he doesn’t have a girlfriend (given what he told this girl, that since she had a boyfriend why should she mind him getting attention, which implies that if you’re single you can get attention) and isn’t interested in all the mindless idiots who fan him etc do you think, he seems interested in me? Why would he stare at me and smile instead of doing so at a girl who was already greeting him?

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Ok so, I added this guy on Facebook a few weeks back and he added me back.


So yesterday I was asking him about this undergraduate project that he took part in and asked him whether he'd be free to talk about it with me and a friend about it.
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And basically he said not this week and how it'd be better to email him. So first I was like alright, but how about next week as it'd be easier to explain in person...
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And he was like OK but then after that he was like please just fb message me and I'll try my best to answer there. And what kind of questions do you need to be answered.
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And eventually he agreed to meet me sometime next week but he seems really ticked off about meeting up with me, even though when I thanked him for agreeing to meet me he said "no worries".
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So I don't know I don't want to be seen as annoying and pushy, when clearly he has no interest in meeting me. So I was wondering, since I have no chance of getting him to like me now, what would make me seem less desperate and weird?
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Cancelling plans politely, or going there with a friend and asking whatever questions we had
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(cause tbh I can ask anyone, this was just an excuse to get to know him since I don't see him around campus that often so the only way we could sit down and chat is by making an appointment to meet :s)?
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Cause yeah... I really doubt I have a shot now, so I don't see the point in putting myself out there (being given zero encouragement), showing him I like him, and then being shot down... Please help!
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Well I guess I've gotten my answer. We were supposed to meet today at university... I waited for 25 minutes with my friend... He never even showed up...
What does it mean when a guy walks by and stares into your eyes, while smiling? Would he be interested?
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