<human>: Before Christmas my girlfriend showed me this infinity ring that she liked. I liked it too and ended up getting it for her for Christmas. Inscribed it says "I love you."

Last night she got emotional and said that she shouldn't have shown me that ring. She said that the infinity ring ring represents a lot to her, and she felt like she "told me" to get it for her. I got somewhat upset because I felt like she was saying she doesn't think I truly love her. Everything for the most part has been fine lately so I wasn't sure where this was coming from. I don't want to be sexist or anything but she is on her period. (Maybe that explains some of the mood swing). 

Today I didn't contact her to let things cool off a bit. This afternoon she dropped off the ring with a letter explaining her feelings. She said that I should only give her the ring when I'm ready to give her my love (on my own). 

What am I to do in this situation? I'm frustrated because it feel like she's doesn't think I truly love her. And also feel like I'm getting cornered into something. If I don't give her the ring back eventually she'll be upset, and if I give her the ring back too quickly I'm sure she'll think I don't "mean it."

Can you succinctly summarize the text in 1-3 sentences?
<bot>: girlfriend gave me back the infinity ring she showed me, because she wants me to show a sign of my love for her "on my own"