what should i dooo???!!!!

My babydaddy and i have been together for 3 yrs , but i still can't forget my first love (first everything) he texts me and i text him and he tells me how i will always be his no matter what and part of me agrees 😔 I know its wrong but I can't help it . I love my man but I'm not IN LOVE with him if you know what i mean . Any thoughts?? What can i do??