Why is it so difficult to know if a guy is really interested in you or just friendly?

_caramel_c
I met this guy through my housemate at a party couple months ago. We started to talk more when my housemate had invited him over for dinner at our apartment. She knows I am interested in him, so couple hours after all 3 hung out, she decided to excuse herself and head to bed.
Then it was just us two. We talked and talked for hours and seemed to get along pretty well. We STAYED UP ALL NIGHT talking and watching concert streams. He’s usually not a night owl, but surprisingly was one that night. Next few days, we were messaging on and off talking about potentially going to concerts. Then we purchased tickets to 2 concerts. He is currently obsessed with a band I had shown their music to and is now attending a concert of them.

However, there’s been moments lately where he has been cold and not really texting. My housemate says he is a very shy guy, so I have always been initiating the conversations while he hasn’t yet. Could this mean he’s interested especially cause he already bought concert tickets and to that perspective that’s initiating a move there? Or is he just interested in the music and finds it cool that someone could join him at these concerts?
Why is it so difficult to know if a guy is really interested in you or just friendly?
7 Opinion