My marriage was all about my DH's health (God bless him! He was a wonderful man!). Even before we got married we went away to a diabetes workshop and I looked around and realized what my life would be. The workshop was in a very plush hotel, and I saw other couples with babies and it hit me what I was giving up.
Then my bf, being an active alcoholic when I met him, also required a lot of "caretaking." He went from one crisis to another-- REAL crises, like quad bypass surgery, lawsuit from exW, layoff from work, mom with NHL.
But now... I'm free of caretaking responsibilities, and really even opportunities. I'm quite sure I don't even know exactly what that means yet, but I'm liking it!