I'm so confused, he's pulling on my heartstrings. :(?

Okay the other day was my last day of school and me and a lot of friends we hanging out. We all went swimming then hung out at Walmart then we walked to my house. I'm gay but nobody knows yet so I was playing along with all the guys and flirting with the girls(really bad habit of mine). Well this girl was like " Oh Cody we will be happy forever baby," just kidding around and such. Then Austin was like " Oh no me and him are already happy," and he starts hugging me all and stuff. Then we get to my house, and we all decided to go sliding down the stairs with blankets and stuff. Well me and Austin were sitting down at the bottom of the stairs and he slips his hand into mine and laces our fingers and he asked me if it was weird. I said not really and we left it at that. He let go and we all went upstairs and we started having piggyback wars and Austin jumps up on my back and I start walking around and he sorta lies his head on my shoulder and starts rubbing my pecs and I was like woah but kept going and then I slipped and fell ( I'm a klutz) and we sat there laughing. Later we watched a movie and he started rubbing his feet on my legs and then starts playing footsies with me and then I laugh and sit up and he does too. We continue watching the movie with our friends and he grabs my hand again and holds it for a while and then I let go because I didn't want anybody to see. The next day I was thinking YES! i've finally found the guy for me and so i asked him if he was gay on facebook. He said no and I was heartbroken. What do I do. You have to understand that Austin is completely obsessed with the army and I just can't decide if he is lieing about being straight. I can't think about anything else. Sorry it was a long one.