How do i tell how he feels?

so theres this guy thats 2years older then me at my highschool. im in 10th and hes in 12th.its very common in my school for an age difference like that cuase its a small school and ive been with a senior before.anyways we ended up going out to dinner once and then we had plans to see a movie but his mom make him run erins for her so we were late for the movie so just went out to dinner again.i think im starting to fall for him but idk how to judge how he feels about me.would he hang out with me one on one if he wanted to be just friends?he payed for my dinner and opens the door for me.we havent done anything like kissing/holding hands or what not.he IMs me almost everynight and if he doesnt, its generaly cuase hes not home if i do go to the movies with him how do i act while seated and stuff-i mean i dont wanna cuddle up to him or anything if he just wants to be friends.so i guess bottom line is here in my situation,how do i tell/what could be some signs that he mihgt have a thing too