Well if u arent sure about ur feelings for him, just tell him that u need some time to answer or figure it out. Overthinking it would just lead things to become more difficult.
prob reject him then
tell him u dont like him. he's gotta respect that and if he doesn't, cut him off
just tell him that you’re not interested and not ready for a relationship. it is best in this situation to be as straightforward as possible. in my opinion, if you gave him false hope, and you half heartily committed to a relationship that you’re not ready for will hurt him more than you rejecting him. but at the end of the day it’s how you feel, so take as long as you need to figure things out with yourself and him. things like this take time, and that’s perfectly fine.
so like there's this guy that i talk to and me and him are sorta friends, he told me that he has feelings for me i think he wants a relationship with me the problem is that i'm not interested in dating and i still haven't figured out my feelings