"I couldn't be more excited and lucky to have her as my future wife and partner," entrepreneur Carter Reum says of Paris Hilton ... I love being your Princess! 👸🏼 Never in my wildest ...

Reum proposed to Hilton on a private island days before her 40th birthday with a one-of-a-kind sparkler fit for a modern-day princess Paris Hilton got a very special new piece of bling this ...