Need some good advice?😅😭

My ex boyfriend and I broke up, about a month ago. A week later he kissed and we started having sex again. We stop having sex because he said he feels different about me, said he didn't know if he loved me anymore. Yesterday we had sex again I asked him if he loved and he said yes but no he told me he likes being with me and I make him really happy and I hates the thought of me being with someone else but I stress him out to much and wants to stop this and focus on school and work and that he wants to try to have sex with some else to see if he just wants to fuck or really be with me. He told me he wants a break from feeling like he still has to be loyal to me when we broke up and wants to live and experience something new for a while before he decided if he wants to just be with me. (Btw we had a daughter) he says he want to try to work things out because he wants us to be a family and plus I love him and still want him. Idk what to do because I know if I tell him I don't want him to fuck another girl he won't fuck her. But I don't want him to have any doubts in his mind so any advice on what to do? He's 20 and I'm 18.