What do you think if I technically cause a friendship issues between my boyfriend and his long-term friend and not accepting her apology
It sounds complicated. Have you had these kinds of issues before?
In junior high school, she was bullying me because of jealousy over a boy.
Does the apology seem like it is sincere? If it does, you should try to accept it, or you will come across as rude.
It does feel sincere.
Then you should just accept the apology and move on. There is really no need for extra drama. It will only cause more issues down the road, and it's really not that much fun.