help getting over break up :(

I dated a guy for 9 months, he broke up with me about a month ago and I'm struggling soooo bad trying to get over him. He's obviously doing fine without me and got ride me of me so easily it just hurts so much bc I still have feeling for him 😞, School starts in two weeks and I'm terrified of seeing him with other girls, having fun without me. He's that really attractive football player and my stomach flops everytime I see his name anywhere. I need help getting over him entirely the fastest way possible. I'm trying so hard to let him go but I just can't. Please help :(