What do i do?

Today is my baby-dads 22nd B-day, and i guess I'm taking it well, I mean good. I guess as my baby gets older it gets harder for me to cop with, she asks all the time about him...What do i do? How do i let her know that it wasnt daddys decision to go nor yours,or mommys God just seen fit to take daddy away? I need some advice because i am so lost in this area...Tryin to find myself as well as my mother instinct