Concerning your initial statement I think there are some deeper questions that aren't being answered or addressed.

1. I don't mean to be a bummer, but for the most part everybody dies alone. What mean by saying this is that in the sense of individual consciousness each person dies alone; regardless of physical location, or if they're surrounded by loved ones or if it's a complete accident like an automotive wreck.

2. The kid thing. I think that is a personal choice that many people who don't have mental illness struggle with. I don't have a partner currently, but I talk about with close friends from time to time and I'm not sure that I want to have kids, at least a child of my own. Yes, the alternatives are tougher for people with mental illness but if you have a strong desire to procreate then the best thing you can do is to make that one of your core values, that you want to start a family. Live by that, and if your current boyfriend or any future partners don't agree with that value then maybe it's worth reevaluating that relationship.