Has anyone here gotten over their first traumatic breakup

I am 16,this breakup was my second breakup but it has been extremely traumatic for me and Im afraid Im gonna be feeling this way forever.Upset over someone who has moved on,upset even though I messed up.Even if I learn to forgive myself i will still miss our relationship.I don’t want to feel like this forever I want to move.We broke up October 2024 and I am still just imaging all the “what ifs?”

One day Im over him,the next day I hate him,the next day I hate myself and miss him.Im all over the place. I really need some hope right now