is he bisexual and does he like me? i'm gay?

[classiceditoral]

i'm a gay guy who is not out. anywho..for the first time in my life there is this special someone who i can't stop thinking about..and i love him. His profile says that he interested in women, but he has done things in the past that sparked my trigger. when walking up the stairs he grabs my ass out of nowere.. in gym he compliments my legs..he tells me i look so hot when my hair is spiked. he goes to the gym, and he pretty built. once during an exam he came up to my desk.. and wrote i love you with an arrow pointing at me and walked away. everytime he did these things...he would just stop stare at me..with a eye to eye contact look...i would just smile/laugh to keep it as a joke and not make it look anything really serious..
we also have worked at the same job.. then i quit ..got a new job. but now he works there too. he has never had a girlfriend..and his personality is amazing! he is werid but in a good way..

so does he like me?or he just being a typical crazy straight dude
also we were in the backseat of a car once..we were stoned.. and i would just look at him and he would have this big smile on his face....our arms touched abit but then he moved his arm away..i tryed to get closer and did it on purpose to my arm closer to him to see what he would do....our legs slighty touched too. then i went foward and he feel behind me leaning on my back..with his head near my ass..he stayed there for awhile then got up.

i really like him! and i always look away when he looks at me!

is there any signs on what bisexual guys might do to give off hints or something?