DP's MH has impacted and permeated every area of our lives for 20+ years. He has periodically suffered from depression with suicidal ideation and anxiety. He has once attempted suicide. Despite being carefully managed with self-care (as a HCP he has good habits), periods of therapy and / or medication, part of the management has always been about lifestyle and ensuring he doesn't become overwhelmed or take too much on. This has meant that I have always been both the gauge and the buffer; perpetually keeping an eye on whether it looks like the 'life-puzzle' is becoming too full, and pre-emptively picking up slack to prevent things getting on top of him.
It has meant missing out on many things and choosing some alternative and unconventional pathways to either accommodate DP's fragile MH or prevent relapse. It has meant that some other relationships and friendships have remained superficial and not grown as I might have hoped, as MH remains a sensitive subject and people, however lovely, do not always understand how to engage with it or families impacted by it.
Boundaries are great, and an expectation of self-care and conscientious management an excellent baseline, but life happens and as a partner of a person with a history of, or current, mental ill health, one is likely to always be in a state of heightened vigilance, looking for signs of recurrence.
I obviously don't want DP to experience dips in his MH because it is distressing for him, but I also don't want him to experience said dips because it has the potential to impact everything else in our lives. Despite our best efforts at finding a balance between 'MH-proofing' our lives and allowing for life to take its course, we can't get away from the reality of how much of a PITA it quickly becomes when he finds himself feeling unwell or suddenly anxious, and commitments still need to be kept and contingencies found on a dime.
It can be very lonely. DP and I have ventured deep together and have a bond and connection which has been forged in hell-fire, I sometimes think. But given my time again, I wish I'd not imagined I could be a rock, and passed.