How do you feel about leaving family/friends?

I mean, experiencing life through a new brain/body ( provided its a decent life) is better than eternal nothingness ( not that I think it's even logical for that to be a possibility) but I can't help think about/be sad about the possibility that after death I will never see my family again (atleast not knowing it's them as their consciousness will be experiencing life through another brain/body as well somewhere in the world) Does anyone else think about this?

Also, what are your best arguments for why you think consciousness isn't created by the brain and why it doesn't make sense you can experience nothing after death?