He asked me if I would take him back

We dated 4 years, I broke up with him after a fight we had about me not giving him enough time, this was a reoccurring fight throughout the last year of our relationship so I decided to end it this happened about a month ago. Today he texted me saying “Would you ever take me back in the future?” And I don’t know. Part of me wants to be with him now, I miss him like crazy, but the other part of me says no, what if there’s better for me out there? I feel like I’m remembering the relationship better than it actually was, I’m not sure if the feeling of me missing him is real. I just don’t know what to do could you guys give me some advice?