Girlfriend of 4yrs broke up with me saying she wasn't happy and needed to figure herself out, what did I do wrong?

Sfcd360
I gave her my life and she crushed it. I gave this relationship everything I possibly could mentally, financially, emotionally, you name it. When she wanted to give up on getting her degree I encouraged her and even fronted her money for the classes and books to finish up. I pulled strings to get her the job she wanted after she moved in with me 1 1/2 years ago. I fronted her almost a grand to get her car fixed and even paid for part of it. I put my name and money down for an apartment so she would have a place to stay after she left college. I put myself second for her.

We would fight over the same issues, and it never got resolved because she could never make an effort. I couldn't trust her, and she kept doing things to justify my mistrust and insecurities. She would never communicate with me, and when we did it was never constructive. It didn't last. I can't help but feel betrayed by the woman I loved so much, like I was used and she put on a fake smile for however long she's been feeling this way.

I need to know what I did wrong, where did I stray?
Girlfriend of 4yrs broke up with me saying she wasn't happy and needed to figure herself out, what did I do wrong?
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