XAH used to do this to me all the time. Very subtly and not so easy for me to identify. I stopped believing myself. I began to doubt myself so much. I believed my own memories were false and I must be losing it. It kept me unbalanced and in a place of low self esteem. Gaslighting is dangerous! I agree with tenninetysix - it's a despicable method of passive aggressive psychological manipulation & borders on sadistic - it was all part of his methods of emotional abuse and control.