<human>: Hello guys,

So my girlfriend and I met 2 years ago in college and we're basically inseparable. We had plans of moving in with each other and getting married. This past month, she started to feel not like herself and a bit depressed to the point that it was affecting our relationship. She also got physically sick. She told me that once she felt better, was home and she finished up her summer program (she was taking a certificate publishing program to get a job as an editorial assistant and it was stressful for her) she would be back to herself. 

All of a sudden, she comes over and breaks up with me on Monday. She said it was because "her view of the relationship was changing", that "she was changing and she didn't want me to change", all of these bs excuses that provided me with no closure. Later I texted her for the real reasoning behind it and for her honesty and she said it was "little things that I had done that had added up", like "not buckling my seatbelt in the car" or "being distracted on my phone while she would try to get my attention" and that she didn't want to be in a relationship. Again, excuses that provided for me no real reasoning or closure behind this. 

I spoke to her best friend about it a day later and she had no idea that this happened, and when she texted my ex, my ex gave her the same reasons I was given. I know for a fact there's no other man in her life. I'm actually worried that this is her depression taking on a more sinister form.

What can I do to salvage my relationship? I love her so much and I know she still loves me, but something is holding her back. 
Thanks.

Can you condense the text into a few key points?
<bot>: My girlfriend broke up with me out of nowhere for reasons that make no sense to me. Might be due to a recent depression issue she's had. Need advice on how to save our relationship.