Advice

I really need advice. Idk what to do. So me and this guy been dating for 2 1/2 years. And during that time i caught feelings for 3 people. And I hurt him. We broke up this April & it's been months and im still not over him. I told him my feelings in person. He told me that he didn't wanna worry about anything right now. That he just wants to be with his friends cause he feels most happy wit his friends. And he feels better cause he doesn't want to stress about anything. I want to show him that , I changed and that my heart is only for him. I feel so shitty cause I fucked up. I love him. Idk if ishould move on or hold on to him.