First off, I'm sorry pb4 for your daughter's loss, and I'm thinking about her and your family.
As for my story -- my husband committed suicide about six years ago. He first came down with UC, and then I did about a year later. We were both very sick, and he had started the Remicade before I did without a lot of success, so he had to continue to wear adult protective wear. He was a maintenance mechanic, and hardly ever able to work because of being so weak, and when he did, he was constantly looking for a bathroom. The job he had was very physical and could leave him in some pretty remote areas, or high on top of buildings. His coworkers were not easy on him, because they felt he was always absent, but he wouldn't tell him about his illness because he was embarrassed. Surgery was suggested, but he didn't want it. He took to drinking and taking meds to calm his mind, which got him into other trouble. He couldn't get control of his UC or his life.
And he had a supportive wife...who also understood because she had UC as well. But he had so many obstacles in his mind that he couldn't overcome. He thought I'd be better off without him. Do I think it was selfish? No, he was ill; mentally and physically. I only hope that he finally found the peace he was looking for; same as every other person that takes their life.