I Like My Bestfriend

I have a crush on my best male friend, but iI`m not sure if he likes me back. I mean, when we first met, we were just friends, but as time progressed, I started liking him and it seemed as though he liked me too. Everyday in band prsctice it felt like he was staring at me, but when I looked his way he wasn`t. Now, it seems like he`s starting to ignore me, and I don`t know what to do. PLEASE HELP! HOW DO I KNOW IF HE LIKES ME?