Real life Christian grey?

My story is just as crazy as the caption. So I met this guy. He's my friends older brother. I'm 16. He's 23. He's beautiful. He's so hot. His voice is so deep. His body is so sexy. He's got the sexiest facial hair. Everything about him is perfect. Blonde hair. Blue eyes.  He's serious but goofy at the same time. I was at my friends place for a party a few weeks ago. That's when I first met him. His names  Austin. I walked into the bathroom and he was in there doing his hair. I said sorry and turned to leave but he said wait do you want to use the toilet and I replied no because I actually just wanted to wash my hands because I had food on it. I opened the faucet and water sprayed my shirt. MY WHITE FUCKING SHIRT. He laughed so hard I went bright red. He passed me a towel to dry myself with. As I was leaving he asked if I wanted to borrow a shirt and I went with him into his room to get a shirt. I put it on as he looked away and then I said thank you. He replied "you look good in baggy clothes, not a lot of girls can pull it off" I was like "ummm okay hahaha thanks" as I was about to walk out I noticed he had a guitar. So I went over and picked it up and took it to him and asked if he could play. He showed me and Damn I was blushing. I realised I began making excuses just to stay with him for a bit longer. We started talking for about 15 minutes and I got up to leave because I felt as if nothing was going to happen. He follows me to the door where as soon as I opened it he pushed it shut again. JUST THINKING ABOUT THIS IS MAKING ME ALL EXCITED HAHA.  anyway he lent in for a kiss and before I knew it we were on his bed. We had the best sex ever. I've never felt so wild in my life. Since then we've been secretly meeting up and having sex every single day. But that's it. We don't talk or anything. We just have sex and leave. And I'm honestly really enjoying it. But I think I'm starting to like him and I really don't want to ruin things. What should I do? Am I just being a stupid teenager? I know I'm very mature for my age compared to all my friends. So yeah I'm kind of confused