Rant about my ex

This is absolutely killing me to be honest I became friends With my ex again it was going good to he started talking 2 me about a girl and im still inlove with him and the jealously is crazy i cant hold it back i feel a burning hatred and jealousy im jealous of the girl for having another chance i want to be the one i just cant find the words to say to him its stuck in my throat lately I haven’t been able to tell him how i feel we broke up. Over a misunderstanding, i miss him a lot he was the only one that made me happy i feel lost and jealous about his exs that he talks to im not going to name drop my ex or the girl he likes because im not that petty but i truly miss him dearly i dont know what to do. It has gotten to the point where i may stop talking to him all together it’s killing me i cant deal with it. I dont know why or what to do,

Update: him and the girl got together:(