No, you shouldn't be the one to leave your home. If she's not happy about the situation, she has two options, 1) stay there and live in a spare bedroom or 2) leave. I certainly wouldn't give up my master bedroom to keep her happy, but that's my personal opinion.

Let's she how she takes the news that you aren't moving out.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.