Breakup

How do I get over someone that I thought was the one for me. Honestly I still think we are. He broke up with me for his ex but they had only broken up because she moved away thinking she wasn't coming back. And we jumped into a relationship a month after they broke up. I've known him for 3 years. He's my best friend. We both had feelings since the very beginning. So maybe it just wasn't our time? It still kills me though. It's been a couple weeks. And when we first broke up and he told me why I died inside. I was broken into a million pieces. I always thought ' I wanna die but I would never kill my self because I love my friends and family too much to put them through that' but in that very moment... I didn't care. I really wanted to kill myself. I was so in love with him. Thank God my friend was there to help me 😔