Hello, Zero.
I'm sorry you're feeling this way. I really took time to post here because I'm not in the best shape to reply this. But I cannot leave you alone with this thought without sharing my believes.
I hope it helps, but I frankly don't know if it will.
Some users like Makko and Ready2DieToday shared a perfect insight on the matter in hands.
What you're experiencing is exactly the feeling that the prolifers do not want to experience.
The feeling of guilt.
Let's put facts about her in the table first:
She was already suicidal, she was living a life that she didn't want to live, she did not think her life could improve and she thought that death was the solution for her problems.
You helped her, in a way you offered information. If this is killing, it's a merciful killing.
Like in a movie where the character B is suffering, dying and asks the character A who has a gun, to spare him from the torment and kill him.
So A shoots B and kills him.
It was difficult, but B wanted. A was merciful.
Legally, it's a problem, but I'll tell you why.
It's legally a problem because people do not want to experience the feeling of guilt. They can know a person is suffering and know that the possibilities of that person stops suffering is next to none, but they choose to avoid the action, because action, bring feelings.
There is a moral dilemma that is teach in some schools:
There is a train on highspeed going towards 5 workers on the railroad, you can move the train to other railroad where there is only 1 worker if you press a button.
Press it and you kill one worker, do not press it and 5 workers die.
Why is this a dilemma? Isn't obvious that is better to spare more lives?
No. Because this puts people in a situation where they cannot avoid the feeling of guilt.
It's a very difficult feeling, a burden. Living with it takes strength and courage.
There is a Hero and there is a God.
A God is all knowing, all powerful, omnipresent and always good.
Being a God can't be too difficult. You can do anything and every action you take will always be the right one.
Being a Hero on the other hand is complicated.
You're human, your strength is limited, your mind is but the mind of a man.
Even so, you need to make choices. Choices that will save lives, cost lives. You might even need to kill some to save some.
And you will have to live with the feeling, that's what makes you a hero, you will have to sleep with this heavy burden.
That makes you a villain to some too. To the people you had to be against it.
In this case, the sanctimonious people that think that life can always be good. That there is always another choice. Even when the person in question don't even want to live anymore.
To those people, you are a villain.
But to her, the one who is most important to you, the one who you really cared about, you are a hero.
You are a hero for her.
Think about it.