Need Advice!! Am I Just Over Thinking This??

So I go to school with this boy, I think he’s gotta crush on me. Not much guys have really been nice to me like this guy has. He held the door for me and complimented my crappy basketball skills in Gym. Lol. But like he’s not the best looking guy. Which is fine I guess. And I think he’s shorter than me. I don’t think I have a crush on him but like I have low self esteem and not too high self confidence. So whenever someone has a crush on me or I think they do. I immediately like, like them back. I think this could be normal, but like I told my friend that she could give him my number. So we could be friends. I think he’s cool. Like I don’t have a crush on him. At least I think. I do think about him not a lot but sometimes a lot. I think that I’m still figuring it out. Also it would be nice to have so close guy friends for a change. Also I told her that she could give him my number because he asked if I had Instagram, which I don’t have any social media. I think that he likes me but I would feel so bad if I led him on and turns out I don’t like him. That would make him feel bad. But he’s so nice and I think I’m just over thinking this. Am I? Or do you think that I did the wrong thing and I should have asked him for his number myself if I wanted to be friends with him??