It's awkward around him now !?

so there this guy in my cl and we always flirting wih each other... he gave me his number and after that we always text but i never text him first because i don't know what to say.he has said before i was cute and he called me his baby and it was kinda weird. so i seen him walking with his girlfriend and i acted like i didn't see him and it looked like he was going to saying something to me but i wasn't sure and when i went to cl i sat by him and we didn't talk and it was weird because we always talk. he asked me if i was mad and i said no i'm just tired.. and he kept messing with me and i keep poking him but we didn't really talk.. I use to not like him but (lowkey) i think i do im not sure???! but i know i will never get with him because he's 18 and im 15 and he has a gf....... I don't want to get feelings for him but i already know i am because im stupid like that! should i just stop talking to him .. do u think hes playing with me ? what to do . i would ask my friends but they never listen to me..