Our relationship has not been good for a long time. DP has self-diagnosed borderline personality disorder and from what I've read on here and elsewhere, I believe it could be fairly accurate. I walk on eggshells, never knowing when the Hyde side of DP will appear. We can have days of things being good, even great and then suddenly, DP explodes, telling the children to shut up (4 and nearly 2) or go away, hiding away in the bedroom or study, smoking weed day and night (normally this is just an evening thing), calling me every name under the sun. When things are really bad, DP self-harms - banging head against door, smashing face up, cutting, etc. and smashing things.
I am not entirely blame free of course having been too busy to really give much to the relationship - first with work, then work and a difficult pregnancy, then two small children and now other interests and two small children. But I like to be busy and guess the longer it's gone on the more I've wanted to keep busy rather than face up to things.
The last few weeks have been really bad and DP exploded when I was getting DD1 ready for school and it ended with me taking both DC out of the house in tears as they were scared shitless. Seeing them like that was the final straw. Yes, I am at fault here too, and I should have done more, but I can at least pretty much keep it together so the kids don't see it. But DP can't and that is no longer acceptable.
I feel terrible at wanting to end things and DP is guilting me by threatening suicide and saying it's alright for me as I get to keep everything while they're left with nothing (which is true to an extent as I have family and guess I'll keep the house for the children's sake), but it's not my irrational behaviour that is causing this so I think I am justified in going down this road.
I've offered support with the emotional/mental health problems and am trying to encourage professional help, but that is not my decision to make.