awww, man, new light ((((((((((((((((((((new light)))))))))))))))))))) i know how you feel sweetie. i'm a fourth generation-er myself, my family is now working on the fifth generation of dubbies with no end in sight. so sad.
i have inherited beautiful family through my husband. his family is small, but close and they have welcomed me and my child with open arms. the first year we celebrated christmas (2000) my MIL came on a cramped plane with boxes of family ornaments (she left out anything overtly religious, she's very sensitive to my feelings on that) and she explained to me and my daughter what each one meant, who had made it, many were from relatives who have passed on. we decorated our tree at thanksgiving cause that was when they were here, and i can't tell you how we bonded.
every year now we decorate the tree together if they can come for thanksgiving (too hard for them to travel at x-mas). we share b-day gifts and cards and the like. it's a joy, and i know i am lucky to have family that can celebrate with me.
i can only hope that family of your choosing, through marriage or otherwise will come into your life newlight, to help fill some of that void. i know it won't go away completely, but i hope it gets better for you.
hugs,
fleur