Chat history may cause some mental issues (that's my case)

Hi. I wanted to briefly explain an issue I'm having with Discord. There are some particular situations for which it is sometimes extremely necessary not to find yourself forced to read certain messages as they would act as "activators" of some harmful psychological reactions that do not allow mental health. Discord does not allow deleting chat history and this is leading me to experience a problematic situation. I was in a relationship for 3 years with a girl. We have always used discord as our primary method of communication especially direct message. The relationship ended (for her choice) in one of the worst possible ways (I'm not here to argue) and the subsequent messages after the breakup, together with the special messages from our past, were the source of my daily malaise which affected my mental health, productivity and made me depressed. Still in these days, these messages, if I happen to see them again, are "activators" of indecent moods. For personal reasons I have decided not to block this person, also in order not to touch other contexts such as the friends we still share, and it seems really unfair to me to be forced to read (and therefore feel terrible) these messages every time I happen to be in contact with her (a very limited contact, for work/study reasons). Deleting the history would be a therapeutic action for me and for all those fragile people who are suffering from it in situations similar or not to mine. Thanks for the attention and sorry for my bad english, i'm italian