Jealous of the relationship locked people around me

I don't know if ohe people feel the same way, but the other people that are around me that are either just getting into a new relationship, or have been in one for awhile. I'm super jealous of them, i know it's not good to be jealous of what others have. But it's just hard for me. I feel like everyone else around me has had good luck in finding the person they're meant to be with. And i felt like i found that too, but we broke up instead. I should be happy for those around me, but lately i feel sadder, and frustrated at myself.