

First off depression is a removed and will have made this whole thing harder on both of you. It sounds like you were moving forward and he felt like he was being left behind.
Could you have done more? Maybe. I think people can pretty much always do more but doing more isn’t always the right thing to do.
Generally relationships should have some give and take, not always equally split though that depends on the individuals. I’ve been in a position several times where I’m the only one making any effort to keep in touch with friends and it gets harder and harder to keep making the effort when you don’t get anything back. Eventually I stopped trying to maintain those friendships and now I just have them on social media and we never interact.
People grow and change and sometimes, with distance especially, that can be enough to end a friendship.
Try to remember the good times if nothing else.
It’s a great book but I dunno about boy meets girl. It’s more civilisation dies and is reborn a few thousand years later with the weird leftovers of the previous one.
Or did it have a romance I am forgetting?