Well, I'm sorry to hear your news, but you know what, maybe in order to detach successfully you might try to stop resisting (since it doesn't change much anyway just makes you exhausted), and accept you situation for what it is. Try not to judge, make conclusions or predictions for the future (such as without him I'll not be okay, and the like). Detachment is when you accept the situation and trust that whatever happens hapens for a good reason, and that the Universe is going to make it work for you in your best interests (even though you might not know yourself what they are). Remember, all these times when things looked really bad and yet something good came out of it?
Then again, I'm not the best cheerlaeder right now (I mean, just look at my sith). But that's what is helping me and I hope it can help you, too. By the way, there's a really good book called "Loving him without losing you". It's a very helpful book; and no, I'm not implying you're acting like a doormat or anything, it's just about how to really value and appreciate yourself and the rest will follow.
I'm in lower Westchester. But I can drive, you know
To get through the darkest period of the night, act as if it is already morning.
The Talmud
