<human>: Provide a brief overview of the text.

All our friends have gotten married or engaged. She's said she wants to get married, have kids. All eyes are now on me. 

I haven't been in too many serious relationships, and I'm old enough to know that no partner will be perfect. But I find myself wondering, how do I know? I don't trust myself to make such a big decision, basically. I don't feel like I have enough wisdom or enough information to play dice with the next several decades of my life. 

I imagine we'd be pretty happy. We get along fine, communicate well, we've built a beautiful home together, have an adorable dog. She has a good sense of humor, and we laugh a lot. We are pretty good at co-managing the household finances.

There are downsides, of course. Our intellectual interests are pretty different. Sex isn't great, never has been, and that makes me pretty sad. She can be kind of selfish, and gets angry and defensive when I bring up problems I'm having, so I kind of shy away from doing so. There are also less romantic concerns: She has a ton of college debt, about equal to what I've saved up. Alcoholism runs in both our families and that scares the shit out of me (neither one of us struggle with it right now, but I can see the tendencies, and worry about what happens with kids).

We could probably putter along forever, and be pretty happy, I'd bet. She's said she's worried about her biological clock and I don't want to be a coward who ruins her chance at kids by waiting and waiting and then backing out. I also don't want to miss out on a great life and a great relationship because I was scared to take the plunge (either with her, or with someone else). 

I'd love any recommendations of thoughtful books or essays on this topic, too - anything that will help me feel like I'm making a more informed, smarter decision.
<bot>: How can I tell which aspects of my current (or any) relationship are truly magical, and which are basically nice qualities I'd find in most partners? How can I tell whether this relationship is the one?