Need help with some guy

There is a guy who always saying to me good morning or calling my name randomly(like walking through hallway and he calls you and dont say a word). We are not even in the same grade(he is a junior and i am a somophore). Last year we were in the same club but we were not that close. But that interactions makes me confused. He is a nerd with the every definations(geek, weeb whatever you call). Well i am a nerd too so i couldnt understand why me(i am not a beauty or anything). We were talked about video games actually the topic was about am i an asocial. He said to me you should make strong relationships with people(more than once). It was our first proper conversation. Then we started to get the same bus and we had to sit next to eachother for a couple week. He opens door for me or when i open for him, he holds the door and let me first. First i thought he wanted to be friends since we have similar interests, however i am not sure anymore.  It is been whole 5 MONTHS!! (we have met for 1 year and more) He is still talking to me but not in a friendly way i think(i am being delulu 100%).  Ofc we hold normal(ankward) convos. But one time(in new year eve at bus) he said what is your plans about next year, what was your regret. Tbh i like talking with him so i continued the convo. He was quite stresses because he will take universty exam next year. And he gived me "brother advice?", are him being real? We bornt at same year. And even worst he talked about his old crush who GRADUATED from our school IN 2023 and he said he is still thinking about her time to time. He were just said"do you see dreams?". Then he continued talking to me like this things are nothing. I still caught him looking at me. When we saw eachother still we talk. 

There is more but the paragraph is so long i guess. I need advice right away. What should I do?