At the wedding, I found out that the groom was supposed to marry... not me.

Imagine this situation...

It's the morning of the wedding. Everything is perfect.

And suddenly, an unfamiliar elderly woman approaches the bride and quietly says:
"You're a good girl... but my granddaughter should be wearing that dress today."

It turns out the groom had been dating another woman for seven years. He proposed. Then he suddenly disappeared and, a few months later, met his current bride.

During the reception, his ex-girlfriend appears with a box. Inside is a ring, photographs, and a letter he once wrote:
"You are the only woman I want to marry."

The celebration turns into a real movie. The bride takes off her ring right in front of the guests and leaves.

What would you do in her place?

Personally, I don't know what I would do,

because if I decided to marry him, does that mean I must love him?

Or am I wrong?