Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first.
How long have you lived together and are there any children involved?
How much is the house worth and how much is outstanding on the mortgage?
What other assets are there and what income do you each have?
Then yes I am afraid that as part of the financial side of divorce proceedings she can indeed force a sale so that you each have your share of the equity with which to move forward
I am sorry to give such bad news
Please ask if you need further details
Without a divorce she can only make you leave if you are violent towards her whilst she is living there.
However she can use Property Law to apply for a sale as well as Family law