* Why do we "fall in love" with people with shared intense situations, but when the dust settles, find out that person really wasn't good for us, or we weren't good for them, at all?
* How can we avoid intense bonding to those for the wrong reasons -- and how do we recognize what the wrong reasons are?
* How can someone bonding through a lot of trauma know they are "falling in love" rather than "falling in pain"?
I don't think I saw this before, so I'm kinda the "current crowd".
I could be missing something... but I don't think people "fall in love" because they share a common trauma or are working on a common issue. And that is no small point to the subject.
I just think it opens a door of intimacy. You can have intimacy with parents and friends; it's not "falling in love". So, it seems the trouble is something else... not the thing they had/have in common.
As you said, there might be benefits to being with someone who "knows what it's like", has a common experience. But what are the benefits? And people should not assume those benefits are there, but rather test to see.
If someone shares a common trauma or struggle, they may be well informed about it, and you might
assume they can be empathetic and helpful; but they may not be a particularly empathetic, forgiving or helpful person.
Simply said, having a common issue with someone merely opens a door to communication, but puts one right back to the basics: don't assume anything about them and get to know them over time, just like anyone else. In other words, the problem is wishful thinking and assumptions.
There's another issue I've seen. For instance, an alcoholic may semi-subconsciously seek out people with obvious problems because they assume they are the only people who will put up with their drinking. They may be right, or they may be wrong or to certain degrees. It's a bad setup because you're starting with their problems and you're giving yourself an excuse to drink as payment for dealing with their problems.
* How "healed" does someone have to be to look for a partner?
Obviously depends

. Nobody is or will be perfect. One can analyze their issue, maybe get help, and setup for themselves prayerful guardrails. Assuming they want to marry, I think in most cases (after common wait times after traumas), people can seek a spouse immediately. I think if people avoid making assumptions and are resolute on being with a sincere christian they have a good shot.
* How have you helped others who have experienced get out of these situations if/when they turned unhealthy -- or even dangerous? How have you gotten out of them yourself?
I once assumed someone born with physical challenges must be empathetic. I was very wrong. Breaking up was unpleasant, but c'est la vie. I mean, what do you want?
