How Long

How long does it take to forgive someone? How long does it take to forget that you were hurt so badly by someone you trusted so much? And even though that person hurt you in ways that you will never get over, why do you still wish that person would call and just say hello, how are you, and im sorry? And even if they said it, would it matter, what would it change would it ever be the same again? Damn...i do miss my friend though even though she hurt me and crossed lines that were very solid and did irrepairable damage. Damn, i wish she would just call sometimes and just say im sorry.
Its been years since this long series of incidents happened (incidents i just cant bring myself to get into right now). When do I stop thinking if this person is ok and happy and healthy?