Despite the fact that Mary keeps saying I was the only man she'd like to marry, when I proposed to her, she said "NO". I cannot make head or tail of it.
プロポーズもしないうちから、結婚式の計画をするのは、本末転倒だ。
Planning the wedding before proposing is putting the cart before the horse.
その女性は彼のプロポーズを受けるべきかどうか迷った。
The woman was at a loss whether to accept his proposal or not.