Sex with ex

I still love my ex, and he is proposing me to keep seeing him it’s exclusive but we keep fkg.. Im not the type of person who will have a sexfriend but here I am. I know I need to let him go but right now I can’t. The chemistry we had was too real, and I loved our intimacy. And I don’t want to lose that. He is 3yrs older than me, I’m 24F. I don’t want to start over start dating and all that I put so much effort in this relationship. He probably thinking I’m the dumbest like I don’t have self respect or dignity, It’s really hard i need advice.