When I went for help, I went by myself, and it was terrifying to sit there by myself, not knowing what I would say. But to have taken that step and been through therapy by myself. On one hand, I don't feel I can heal as much as I'd like to, but on the other, I feel that to have healed independently and been responsible for myself throughout the worst stages of my illness, has been better for me.
I really feel that support only really comes when a couple have become a partnership because they love and care for each other. In the course of a relationship, one partner may become ill, and that is heartbreaking. But those partners both have something to work towards. When people get into a partnership with a person who is in therapy, or who has untreated PTSD, then it is illness & carer relationship from the start, and healing will effect that relationship, but also, the relationship will effect healing.
I know that relationship breakdowns hurt, whatever the reason for them. But when it comes to PTSD, I do think that in the long run, sufferer/carer relationships are unhealthy - in those cases, to walk away is a step needed to become a responsible, independent person rather than somebody's sufferer. It is complex, but sometimes the hurt of a relationship breakdown can lead to something more healthy in the long run.