He proposed to her in California where they had visited a few years ago at his cousin's graduation. He remembered taking a stroll here near the hotel and fell in love with the breathtaking view, and planned another trip here from the East Coast with the fake excuse of "the younger brother of that cousin was graduating". Little did she know, she was getting the surprise of her life and she cried many happy tears as she said yes.
He designed the engagement ring using CAD! It's so cool to see engineering tools being put to good use other than science.
Proposal planning by @theheartbandits