Advice?

I’m really struggling atm! I split with my ex 3 months ago, he cheated on me and fed me so many lies, I’m still in love with him. I’ve blocked him off all social media and I’ve not seen him since. I’m scared I’ll never be able to get over him. Im not sleeping n I can barely eat. He’s on my mind 24/7. My self confidence has dropped massively. I just want to be happy again. Any tips on how I can get over him? It’s breaking me.