Detaching is not a so much a physical thing (although that is sometimes a necessary part), it's an emotional detachment, allowing the other person to live their life as they choose, your emotions are not enmeshed with theirs, you don't try to influence or control them in any way, you respect their right to live their life.
I think I might have mentioned the livestrong list on detachment, print it out and read it everyday, that and a Melody Beattie daily meditation book got me through the oh, so difficult early days and I still use them for keeping my head straight.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss