Why am I feeling like this?

I left my toxic relationship of 5 years after all those times my ex cheated on me I forgave him, I guess his issue was that he was a manwhore.

I found someone who I thought was the opposite of my ex. He treated me like a queen but a year went by and he showed me his true colors. I feel like this relationship is much more worst.

I find myself missing my ex.. I think about him so much to the point that I wanna reach out to him.. I know deep down he wasn’t good to me at all & I deserve a lot better. Any advice ?