Friendship Love

Hi. My friend Luke Cossman is an amazing guy and I have a crush on him. I want to ask how can I tell if he likes me back? He Teases me, he USED to walk with me to my classes and hug me but now we're in high school and getting in to fights. He had asked for my phone number from my other best friend Kimi Bryan. It seems we're just drifting apart. Just please tell me whats going on and what can I do!