<human>: I (25m) got a ring back from my ex (23f) last night. Backstory: I got it for her when she moved to grad school last month. It was waiting for her in a box that had "feeling sad? Open me!" As part of a domestic survival kit I made her before that had a bunch of movies and batteries and a knife and flashlight, candle, etc. THIS box contained a $500+ ring I had made a month before, which was hidden behind a picture of us and all held in place and cushioned by comfy whale socks. I also wrote a bunch of loving and endearing things in the back of the box. Because the picture left a gap and exposed some of the writing. So I figured it would make her curious and pull the picture out and see the ring behind it. So needless to say I poured my heart into it.. but she didn't see it until the day she left for good..
Intentionally without saying goodbye... And she opened it as soon as she got there and didn't know what to say to me. 3 weeks of no contact later and she has a new boyfriend. Says she doesn't love me anymore and hasnt for a while. So I asked for it back because I felt humiliated and didn't want $500 going down the drain because that was very difficult to afford. We were together over 3 years and bffs over a year before. Same high school, even went to the same daycare and never met till college. So it's been a lot of shock and a little weird adapting lately. 

Yesterday I found out she was in town and asked for it. She dropped it in my mailbox but refused to see me so it was a little weird. I want to sell it and use the money for a couple tattoos and a camping trip to celebrate with myself. But what sucks, and what this post is about, is that there's wear marks on it.. she did all this to me and acted so cold but she actually wore it? I can't understand why she'd lie about it, wear it, and do that to me? Am I missing something?

Can you condense the text into three sentences or less?
<bot>: my ex returned a ring to me so I could sell it. But it has markings on it that suggest she wore it? Why lie about that and be so cold and harsh?