i need advice and help

I’m 15 and so is my boyfriend. We’ve been dating for ab 10 months. Our relationship started off amazing and ever since he started basketball he became distant and has been ever since. It has led me to be very clingy and worried all the time and cry myself to sleep and be terrified something was gonna happen to us. We would fight constantly over stupid stuff and I would overreact over everything (still do not as much). I know he cares but he doesn’t show and it really bothers me. He will always joke around so much like not let me hold his hand or kiss him and push me away. And I know it’s a joke but it’s annoying and gets me worried. I get so scared and I blame all of this on myself for being too clingy and bothering him so much and i don’t know what to do. I want everything to be good again and I want to feel like he actually wants me. I want us to be happy again and never be in any stupid arguments. But most of all I want him to open up to me. We love eachother but our relationship is a wreck. (I take a large part of it). I don’t know what to do and I need help. I need advice on how to be a good relationship to make things good for both of us and not feel negative towards eachother. Please.