yes, people can change. Truth is we are all in a constant state of change through our entire lives as we grow, learn and have different life experiences. But we can change with or without our partner. In a relationship, we may grow closer or we may grow apart. We learn what we want in life and get the courage to seek it. And of course, there's the will to change and whether or not we want to.
In your case, you're suggesting changes to your girlfriend which she's rejecting. This means she's not willing to change. It would be a very different scenario if she agreed that she has issues and sought counselling to address those problems.
For what it's worth, I agree that she's manipulating you with these threats of suicide. But even if she's serious, it's one hell of a red flag in favour of leaving! And no, I'm not talking out my arse here - my ex-h attempted suicide after I left. But I recognise that he ignored all the warnings I gave about being unhappy, therefore it was his fault that he was in the situation. Had he chosen to recognise that I was on my way out, he could have a) made some changes to keep me or b) make the choice to end it and put some plans in place for himself
Edited to add: I agree with the others that a 'rough relationship' is not something to expect. A few hiccups, sure, but not having a hard time
Last edited by basilandthyme; 09-05-14 at 12:04 AM.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.