"Whenever I'm with you I have these incredible moments. You know, I thought to myself I could see myself with this woman for the rest of my life. I want you to know that I think you're an incredible woman," Flajnik, 29, told the 28-year-old model on a snowcapped mountain in Zermatt, Switzerland.
"I have waited a really long time to tell you that I am in love with you more than you will ever know and this whole experience and journey has been worth it every step of the way," he continued as an ecstatic Robertson, who was clad in a black Alberto Makali design with an embellished neckline and elbow-length leather gloves, accepted his proposal.
Prior to the emotional moment, Flajnik went ring shopping with celebrity jeweler Neil Lane, choosing a gorgeous sparkler for his bride-to-be.
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