BOY PROBLEM. HELP ME PLEASE!?

this is in my school, umm.....theres this guy and i think i like him. well, ive caught him staring at me a lot of times . recently he randomly asked me this location of a girl hu i dint no about(like he noes that i dont really hve much to do wid hr and i obviously am not the one hud keep track of her). Then he like smiled at me once. he has purposely bumbed into me many times. and umm.....recently he drank water from my bottle. like v had gone for this school trip and i was wid my grup of frnds and he was wid his. so we did sum climbing and he was tired, iguess, so he drank water from my bottle wich seemed awkward bcoz he cud drink it frm oders too. i mean v r nt gr8 frnds or anything so its weird. and right after that he told me that he drank water frm my bottle wich was awfully nice of him(u no guys these days dont do all that). and my frnd was present wen he drank water so she told me that he knew it was my bottle(anoder odd thing coz he shudnt have been nowing that unless he was noticing me, u no..). and im scared to talk to him coz his best frnd(my ex bf) is wid him and im pretty sure my ex still likes me coz he stares at me all the time and acts funny wen im around. so im confused, do u think the guy i currently like likes me too?