Honestly, I had been ready to leave for a long time, and I had been caring for them almost 24/7 for years. The main reason I hadn't left was that I was concerned that they'd end their life. There were many reasons why I didn't want to be in the relationship anymore, health aside.

There was an attempt to take their own life and I realised I had no emotion and honestly felt like it would have been easier if they didn't make it. My brother realised something was wrong so came to see me and it all came out. The next day I was trying to just go on like normal but couldn't, something just snapped. She went to stay with her mum and I had time to think and confirm how I felt. This last part was probably the most important, as it was vital to make sure I didn't regret the decision.

My advice would be: be honest, say you need time to think, give yourself the time and space, make sure it's right for you and if so, leave. If they don't give you the chance to think, then I'd say you have your answer. That's much easier said than done however.