Have you two had counselling? Have the issues that split you up in the first place been talked out?

There is a big difference between loving someone and being in love. I think once you love someone, a part of you always will. Familiarity is safe. You should probably sort out your feelings before making any huge commitment. I am in the process of splitting up my family, and I know how hard it is when kids are involved. I finally had to ask myself if my relationship with my husband was the one I wanted for the rest of my life. When the answer was "No", I knew it was time to leave. In your case, ask yourself if yours with your ex is one that will make you happy in the long run.

I wish you luck (and love!).