Gaslighting is a serious form of abusive bahavior. If you feel unsafe in this relationship you may want to have back up plans or an exit strategy. Having a professional therapist on your team can really help.

These articles may be of interest.
Signs of Gaslighting and the Cost

7 Ways to Extinguish Gaslighting

Gaslighting: What It Is and Why It's So Destructive | The Psychology of Self

Gaslighting: How Addicts Drive Loved Ones Over the Edge