<human>: After a beautiful trip to a state park up north, we came back to the car and she hands me a bag. It contained a necklace: the necklace had on one dogtag a latin expression (I am studying latin) meaning roughly "with my love". The other dogtag featured a crucifix with uniquely feminine little sparklies dotting each corner. The dogtags are small and sort of feminine. Like... really sort of feminine. Like... clearly for a woman feminine.

I tried to play it off, but she could sense my disappointment, and when I asked in a restaurant for her to "tell me more about this necklace!" (Hoping to glean some insight into why on earth she picked this; I'm quite the hopeless romantic and really any not-made-for-a-14yr-old-girl necklace would have excessively sufficed -- maybe it was symbolically girlish?) 

She exploded in self-pity for her giftgiving skills (turns out she herself didnt much care for it, but she'd hoped for a different response); I feel like the worst boyfriend ever. I'm an awful liar, but I shouldve lied harder, eh? She physically stole the gift back and is holding it ransom, hinting that she'll try again. Feels bad man. 

We've been dating for seven months, she knows me very well.  Friends, how do I turn this murky awkward sadness around? I want her to feel appreciated, and I dropped the ball.

Can you summarize the given text in a few sentences?
<bot>: gf got me an ill-fitting gift (nonironically) and realized that and has become morose. Help??