A young man lives in an abandoned town where almost everyone has uploaded their mind into a network (which I think was based on crystals somehow?) so that they can live forever in peace and prosperity. His parents left him as a kid to join the network and left him in the care of a manufactured creature, which I believe was lizard/dinosaur like in appearance because that what the man liked as a kid. He occasionally visits his parents, who are always worried because they want him to "live" forever as they do, and they end up secretly creating a woman for him to fall in love with so that he will want to join them. Turns out that they did this by smushing together copies of his grandmother from a bunch of different times in her life. Apparently someone does this often, because I know the woman has a conversation with another being created the same way, who's basically enslaved
I have no idea when it was published, it could have even been in the last few years. I think the cover was mostly white? Any help would be much appreciated