i don't want to trouble you, it's just one idea that came to me when i was in a similar situation. when i want to ctb it is something that only concerns myself. nobody else. it is my decision. the same as others don't have the rigth to decide for me or to manipulate me, the same i don't have the rigt to decide for them or to manipulate them or their lifes. for example, once i wanted to ctb but as my car didn't work i needed help from a friend. committing s just after my friend helped me with my car would have brought him in a difficult situation. so far that perhaps he would think after that he has some kind of responsability as he helped me to get what i needed to ctb (the car in this moment). i don't have the right to judge your feelings or the relationship you have with this friend. but in a context of cause and effect and assuming the right of self determination, think about what consecuences it will have for her if you send your last message to her in a context of love, ex love and so on. perhaps you will implicate her in something you don't want to or she doesnt want to. it could be that she will see your ctb as her responsability. she could be in a difficult situation then.(she still can feel responsible without massege, seen the history and relationship you had) in my case i tried to avoid this because i didn't want to force my car helping friend in a sitation he didn't cause. ctb itself is in my opinion ones own decision independently from what others did or do. (it sure can be a consecuence of what others did or do but to ctb creates a new situation and is in itself an act that causes (mostly) consecuendces, the act to ctb itself is your own act and in this sense independent from what others did or do (sorry logic and philosophy are sometimes difficult to explain))
i don't want to say what you should or shouldn't do. i just wanted to show one possible point of view in such a situation. good luck and may peace in life or where ever be with you and with us all.