(((Distressed2010)))
I am sorry that you're going through such a rough time, and feeling alone.

Losing a person we loved (dysfunctional or not) isn't ever easy. The few that passed away and weren't dysfunctional in my family were actually easier for me to handle. It was a cleaner "break", and much easier for me to accept.
The dysfunctional family deaths have been very difficult for me to handle. I hope that the grieving forum link given is helpful to you.
Regarding your ex-bf, I'd recommend keeping him in the past for a while. You don't need any more ups and downs in your world until you're feeling more stable. If you're both still interested when you get to that point, then give it a try more slowly (just in case he brings up a whirlwind of intense emotions within you).
Gentle hugs to you.