I love that people are still recommending knives! She dumped him! Read the thread lol.
Seriously though op, good thing you didn't spend a bunch of money on a knife for her. And being you are so young I wouldn't recommend doing so in the future for the next gf.
That's exactly why I typically recommend budget friendly knives for gf's.
A few decent sentimental knives for around $100 or less, is really no different then any other little jewelry gift, (Just way more practical), and in many cases less expensive then a night out on the town, dinner and a show and what not.
No tears if it doesn't work out, (and for the passive aggressive type, as long as she keeps the knife/knives, she'll always remember who and where they came from).
Lucky sap actually found out before the purchase, good thing she's walking away without a chinese Gerber, and isn't walking away with a brand new cnc'd sebbie
Keep that in mind OP, nothing wrong with buying gifts for your girl, but if you ever have to
"think about it" so much regarding getting her something real nice; knife, purse, bracelet, (or ring): you should probably just take her out for a nice dinner and a night on the town a few more times and enjoy yourself in the process, and just see where it goes.