Unexpected breakup with live in partner.

very distressed and upset. Without telling me she took the house key from my keys and then I got an email saying it’s over. Been with her 2 years. Lived with her in her house for 1 year. Can’t believe this has happened to me. This was 4 weeks ago. Some of my stuff is still there. She wants to remain friends. I have met her a few times since then and she is adamant she can only be friends and she no longer has romantic feelings for me. I’m so annoyed as I invested my time and energy in her and and paid for house upgrades and domestic appliances. Now I feel rejected unappreciated and unwanted. I welcome opinions. Was I used and when I’m no longer needed I’m tossed out. I love her dearly and I’m obsessed with trying to get her back. Am I wasting my time. I put all the effort into the relationship. Initiated contact, sex, deciding what to do with our spare time. Lent her money paid for post dates and weekend always because I loved her and wanted to make her happy. I always felt she never cared if we were together or not. Anyone have similar stories to share. Thank you.