Is it normal to go through a sort of grieving process when it comes to setting up custody/ parenting time? 

I recently left my daughter’s father and I am working on a custody arrangement.  I was doing okay until I got to the holiday part.  It just breaks my heart because I realize there are some times or things I won’t have my daughter for.  When does this get easier?  I can’t stop crying thinking about this change.  This is not what I envisioned for her life and it sucks.

Please tell me I am not alone in this.