Nicky’s relationship with his parents is pretty much over. He could deal with their constant betrayals and ignorance regarding himself & his sexuality, and he could keep getting his hopes up and watching them get dashed. But what happened to Andrew is a crime he can’t come back from —- especially after sitting through Aaron’s trial and having to listen to every ugly awful detail.
Nicky doesn’t even send his parents a wedding invitation or a heads-up that he’s finally getting married, and while a part of him grieves the family he’ll never have, he learns to cope with their absence in his life.