My boss is gossiping about me?

I met my boyfriend at work
And we always kept out relationship profesional and secret
Last week my car broke, my boyfriend lives near our office
So i stayed whole week living with him
Our nosey disgusting boss, who always shittalks all the employees , asked him if i moved in with him, since she saw us together at the morning
He said she slives this week until her car is fixed
Next week the bitch lost her mind and when she saw we talk on out table she shouted she can't stand see us together and im not allowed to talk to him anymore and i must be apart from him in the other part of the office
She said people talk about us
Which I find strange, what can they talk about? if we never talk about us with nobody.
I literally barely talk to them
My boyfriend works 17 years here and says she is jealous, she hates see him happy
I dont know how to act
What to do
For no job change its not an option for me
My boss is gossiping about me?
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