someone make me feel better

i had a bf for almost 3 years. I loved him so much and imagined us staying together. long story short he basically didn’t want me anymore out of no where and we broke up. It’s been 9 months since. I’ve been working on myself trying to be happy with just me. The relationship rlly did a number on me. I want to be in love again and actually find the person I’m supposed to be with but I feel like he’s not out there. What if I find someone fall in love and years later the same thing happens and they leave? I can’t feel that pain ever again. My best friend just got herself a new bf and Ik it’s selfish but listening to her talk abt him and her feelings and how things r going well makes me sad. I’m happy for her but I guess I’m jealous in a way. I’ll be 19 next month and I know I’m young but it truly does feel like I’m never going to meet someone again. It just feels like all guys I come across just want sex or just aren’t in the same mind set as me:/