What do I do..

I’ve recently “tried” to break up with my ex but he, keeps calling as if nothing’s happened, I’ve made it clear I’m not ready for a relationship I’m 19 and he’s 22. I also lived with him for a year almost 2 and it was the hardest months of my life, so when I started working again I moved my things from his place and into my parents but he wants stay to be friends and “chill”, I’ve lost a lot of close people and I isolated my self for 3 years for someone who loved their version on me they were creating….

Also I don’t want to ghost him, I’ve been way too nice and I feel stuck…