I've got a better idea, buy every fake, cheap and potentially illegal imitation of diamonds, jewellery, watches, designer clothing, paintings, everything and decorate your house like you're a millionaire. Use cheap building materials to make surfaces look like expensive woods, metals and stone, create fake invoices of expensive purchases, take pictures of yourself dressed rich on expensive yachts, go to functions and get photos of yourself shaking hands with well known rich people. Create an entirely fake identity and make people think your some rich sophisticated charismatic entrepreneur. Max out as many credit cards as possible and fulfil both your and her desires. In fact while you're at it, try to actually become rich by conning people by creating an contingency fake identity in the event of her breaking up with you.
This will all cost thousands and dedication, but hey if it means a lay, wild parties and you're that desperate, it'll not only work, but should things fall through, she'll get your asset as you flee in "sadness" but that's because, and here's the most beautiful "fuck you" revenge part... She'll have all those asset seized by the IRS or Repo agencies due to your tax fraud and owning so much debts and you get pre-emptive revenge; while you use your new identity to start it all over again like a evil cunning prick you are.
What a life, until jail time of course.
...Holy fuck that would make a great fictional story of a serial con-artist who exploits women and destroys their lives in mountains of debt. But one day he meets a woman who's also a con-artist and uncovers his plans and is conflicted by her moral values on whenever or not to ally with him for a new type of con and try his game or stop this cunning monster from hurting others by playing a better con to get him arrested.