Now that you brought up the topic of mental health in relationships, I don't think I ever dated anyone who didn't have some sort of mental health issues, not because I specifically looked for people who suffer, but more likely because I was brought up in an environment that conditioned me to seek people who are different, but also those who share some of my experience. For me, their mental health issues were not really a burden, as I believe I could always see the person beyond those issues. Still, I am certain that my mental health issues must have been deeply triggering for my husband, and yet he stayed by me, just as I did, when he was going through hard times.
However, I don't rely on other people too much, and I don't expect them to be the solution for any problem that I may have. I don't need another person to "save" me, and in general I don't need another person, full stop. I choose to have rs, and I choose to have friends, not because I need them to fill in a certain role, but because I appreciate them as human beings and enjoy their company.