so many regrets, and it's been rubbing in my face daily, I fucking ruined my future. I could have done so much better.
Are you me? This is exactly what goes through my head 24/7. I'm heavily leaning towards ctb the day after tomorrow.
I don't know anything about your personal circumstances and past, and I can not claim to be in the possession of some profound insights about life.
Therefore, I hope that no one will misconstrue the following as patronising platitudes.
From what I can gather, the both of you seem to have a will to live, to be precise: you wouldn't be suicidal if you could undo the errors of the past.
I presume that both of you are at peace with the thought of taking your own lives and may even have completed your preparations.
This means that there is no rush to kill yourself, unless there are external factors pushing you to do so.
It is very well possible that you have exhausted every alternative, but if you haven't, this would be the perfect opportunity to try; what do you have to lose?
Needless to say, I very much respect your decision, whatever it may be, and hope that your pains will soon come to an end, one way or the other.