I think I'm going to do what you have done and adopt a second to be friends with the older one. Hopefully they will bond and some of the separation issues with me will ease.
Mine's hit that teenager stage where sometime he ignores me. I'll walk toward him to try to catch him and he'll dodge a couple steps, so I turn around and start trotting. In an instant he's on my heels, afraid he's getting left out of something. That's how I get him in the house when he doesn't...