I've a difficult SIL, fairly certain it's not me but happy for anyone to call me out if they do think it's me. And I don't want to be to specific in case I out myself. She has been my SIL over 30 years and is just a few years older than me. She has been supportive in the past to myself. However she has had run ins with other family members, I have avoided this by backing down if anything like conflict arises. However I'm finding it harder to manage in the last year. She constantly contradicts me, belittles me and she has created her own narrative of my personality based on a small number of actions. This is generally an unflattering narrative to myself and I'm finding her words and actions increasingly hurtful. Is there any advice that anyone could give me to help me deal with her?