I think printing something off for your friends is a GREAT idea! I don't usually tell anyone about DID in my life because I just know they wouldn't understand. What a tough decision that must have been for you and I commend you on taking that step.
For them, I think they just really do not understand that what they are doing is hurtful. Sometimes when people don't understand something they make fun of it or of a situation to try to ease that uncomfortable feeling....I wonder if that is what they are doing?
I'm sorry I don't have many wise words, but know that you have been heard and I can offer lots of

Maybe you have yet to come upon your happy ending....maybe it's still ahead of you! You will get there!