I moved into my rental property and now I share bathroom and kitchen with my tenant. Does the Residential Tenancies Act apply to me?

If the landlord lives in the rental property PRIOR to the tenant moving in, then you are exempt under section 5(i) of the Residential Tenancies Act. However if the tenant lives in the unit and the landlord decides to move in after, then the Act does apply to you, despite sharing a bathroom and kitchen with the tenant.