I know it's going to be very hard, but what you need to work on right now is detachment. Taking yourself off the emotional roller coaster is one of the best things you can do for yourself. I know it took me a couple months to get there so don't expect to be able to do it right away. But if you can recognize when it's happening that's the first step in being able to remove yourself from it.
There's a good discussion right now about detachment here.
If you love somebody, set them free. http://tinyurl.com/2empx2g
