Please help me Been separated since january

I really don't know if I'm just trying to get back with her just because I really only miss my son or because I do love her. She hasn't been a completely loving wife for about two years... and I was not a completely loving husband, we had good times and not all was bad. But we just can't seem to make it work anymore. But I'm scared if I make my decision to get on with it I might regret it years later. My parents got divorced and my dad still says my mom was the best wife he could have had... and I can see the regret in his eyes. I'm completely scared.