THis all happened during the months of July-October, but I did not know until after, when we started dating.
Basically my girlfriend, cut herself a lot during those months and as very depressed and during Sept and Oct debated suicide (we were just friends at that time, I had NO idea).

She is a lot better now but she was VERY dedpressed.

I think she deffiantly needs a therapist for a little bit. A lot of this depression is from her mom.

Her dad is very nice to her, and I have debated sending him a message saying SOME things, such as plese talk to her about it all. But I wouldn't say exacly what.

What should I do?
Will that ruin our relationship? Etc?

Please, please help..

You tell your parents and have them talk to her parents.

Will it ruin your relationship, "maybe" could it save her life, of course. Sometimes being in love means you have to make the right choice to do the right thing even if it ends up hurting us emotionally latter.

I couldn't do that, my parents cannot know, and her mom CAN NOT know. She is bipolar and emotionally and sometimes physically abusive.

I would like for it to be just a message to her father.

And I have told her that I have thought about sending him a message before and she said she wouldn't be mad bt to "please not do it"

Why can't your parents know ? Sorry, if you feel you are old enough to date, you take on some responsibility,

You know when it is too late, when she considers killing her self again, and you find out in school the next day she did.
Then guess what, you will want to do the same because you had all sort of chances to tell adults that can help, a school counselor, her dad, your parents who can tell others and be believed more.

I did not act one one, someone left a note they were gong to kill theirself, I did not have time to read it. I could have done something and saved their life, They are dead now, since I failed to do or call anyone.

Your choice, which can you live with if the worst of two things happen, breaking up because you got her help.
Breaking up since she is no longer around.

You make great points.

Lived though a lot of pain and suffering though the years.

I have never really regretted what I did to help people, but have regretted things I did not do many times.