Divorce is never easy and it's ok to mourn the loss.  I don't regret leaving my ex and my marriage sucked big time but I still mourned the dream I had.  The dream of being married forever to someone that would love me unconditionally and take care of me and my children.  It still saddens me to know I lost that and I wonder if I will ever have it.  It's scary and heartbreaking at the same time.

Your feelings are totally normal.