<human>: Can you condense the text into a few key points?

Hi, normally I'm fairly private about my problems, and I feel silly, but I need help.

Basically, my grandpa has been n/c with his family for YEARS. Like, since his 20s. He refuses to discuss them, and I know very little about them. I have felt that I need to reach out for years, even if only for medical info. Frankly though, I could really use some family, and I feel like that connection could help. It hurts to know you have family, likely within mere kilometres of you, that you will never know. 

My main issue is, even if I somehow convince him to give me info I can use (names, ages, general locations, etc), would they even care? Should I reach out, or should I just call it a lost cause? I mean, as much as I want a family connection, just calling someone up and going "hey, my grandpa is related to you!" Seems sort of awkward and stupid... But I just don't know what to do...
<bot>: Grandpa has been N/C with his family for years. Should I reach out, or accept that I will never know them? Thanks.