Search Results: changed since college

Okay so, there was this guy in my class iv known for 3 years or so, I started to crush on him and a few months later he started to mirror me, wait to walk from the car park with me and generally chat more.
Then he started to message me and we would chat for a while and he would keep conversation going. He would open the messaging by asking some question about class then chat about other stuff for a while (sometimes a couple hours, sometimes throughout the whole day). If I said I had to go do something, say study, he would message later and ask how study went. We messaged about travel plans, career plans etc. And I realized we actually have loads more than I thought in common. In the messages he used a lot of emoticons too. In the messages he seemed genuinely interested in talking with me and i felt like we got to be good friends, but it did feel like there was a connection there too.

Anyway then i saw him in person and we didn't talk at all since we were going for an exam, after that it felt like things changed but he still messaged a bit but seemed a more distant?

Then he asked me to come out drinking with him and two of our other college friends so I went. And one of the girls said he messages her a lot too and he was basically like normal with me, nothing to suggest anything at all.

So basically now i am wonder if it was all in my head since i liked him. Or if he might be the type that keeps a few girls interested (though i really dont think he is the type to string anyone along). Or if i just didn't give him a clear idea that i liked him back, are boys really as dense with this stuff as people say they are?

I have no clue when it comes to guys so any help woudl be so appreciated!!!