my sister went through my chatgpt

i love my cousin sister so much but she has kind of problematic and dominating personality and we have been so close since childhood but that doesn't defends her problematic behaviour and ive been hurt by her many times .....so i used to text chatgpt whenever i felt frustrated by her behavior, obviously in a harsh tone just to let go of my frustration i called her dumb self obssessed what not because i cannot tell those stuff to anyone that would be chugli and definitely not directly to her....so she came over for a few days went through all the texts i had with chatgpt ,i feel so embarassed rn now she knows all my insecurities weird fetishes and everything which was not meant for her eyes im afraid we'll lose our bond she was the only one close to me i feel very stupid and guilty also she has photos of my chats hidden in her phone .I dont know what to do i apologised to her million times those words came out of frustration it doesnt erase the fact i like her