why am I like this?

Let me start by saying this will not have proper grammar or commas or anything; this is just me ranting and also asking if anyone has had this happen before. Okay, so I had this boy come up to me and talk to me, and that immediately made me have a crush on him, and I had no clue why I just couldn't get him out of my head, and I started seeing him EVERYWHERE. he started sitting next to me on our bus to go to tech (a separate school I go to, to learn life skills) and he started talking to me and i was head over heels like I was obessed with this boy and then like 3 weeks later of this i just like can't find those same feeling anymore. But he knows i liked him because some girl im friends with knew him  and told him and i know he likes me its pretty obvious but i just cant find the feelings i had for him in the first place anymore and i dont want to lead him on but a part of me is telling me to just keep going and get to know him more than i already do and i think thats just because he treats me better than any person ive ever talked to has. I just don't know what to do, though, and I feel trapped in this awkwardness anytime I'm around him unless im drunk; then I'm myself around him. i just dont know why i dont feel like i like him anymore (besdies the fact of i feel like im  talking to a middle school boy) im not talking to a middle school boy though i am a senior in highschool and hes a junior BUT hes older than me by like 4 months which is super confusing. But like idk i just feel so much more mature than him and i think maybe thats why i cant find those same feeling again? i dont know 😭