Guys, can u help me? help with this guy?

over the week off, on monday night, this guy and me had a moment where he tried to take off my pants and i kinda tried to stop him, but he stopped because his little brother walked in the room and we were not the only people in the room when this happened, his sister and her boyfriend where in the room, but they couldnt see us because we when on the bottom bunk. then after the "taking off pants" didnt work we snuggled very closely, like my legs were wrapped around him and his arm was wrapped around me, and he played with my bra strap, rubbing my shoulder, stomach, back and legs. then we started holding hands and rubbing our fingers together. but now he barely talks to me and the closest thing is we got in a little pillow fight, its been a week and 2 days, and at school he ignores me and instead of the 2-3 second rule for looking at eachother, its like 10 sec. that we look at eachother for, whenever i p him he dosnt say anything, and i tols some of my friends and i think they notice too. i really like him, even before this, and his sister is my bestfriend. his bestfriend is going out with his sister (my bestfriend). Can you tell me what he is thinking and What should i do?