I am heart broken, any advice?

Hi, I am 14 turning 15 soon. I have been single all my life, and I am shy around girls. There is this girl that i have known for 4 years, we arnt close freinds but we say "hi" occaisionaly. I have a major crush on her, everything about her is perfect in my view. she is compleetly my type. I know I am young but I like her so much that I feel I love her, even though we dont know each other that well. we have a class together, I am too shy to talk to her but I hear her talk to her freinds, so I learn about her. I like her alot, but about a year ago she got a boyfreind. ever since I have been a bit depressed. I have no one to talk to about this since i cant trust my freinds, and its akward talking to my parents about this. I tried moving on but I cant, she is just so perfect for me. anyways I recently heard that she and her boyfreind had sex. ever since then I have been depressed, I have no one to talk to and I need advice! I try moving on but I see her everyday at school! I dont wanna end up as a homless drunkard who is single for the rest of his life! being single F**king sucks! any advice?