depressed 💔

There's a boy who I absolutely love 😩💜 I'm 16 and he took my virginity about a month ago. After that he started to act completely different than the boy I knew long ago we basically stopped talking he ignores me now and barely speaks to me. It breaks my heart so much because I love him a lot. I've gone into a deep depression of sleeping and all I can think about is him 24/7. I don't know how to get over him any ideas? I've tried staying busy it doesn't help because me and him literally did everything together so everything I do it reminds me of him and I miss him so much I cry on a daily/nightly basis because I'll never know what made him change. He flirts with other girls in front of me and stuff. Our anniversary is coming up this month on the 28th and it would've been 3 years. I'm so heartbroken. How can I get over him? 💔