Request #190

I’m trying to find a book I read years ago late 80’s early 90’s about 2 girls that are best friends. (I think they’re 12 yrs old) One had a dog that passed away and she got her period for the first time. The other friend went away for the summer and when she returned their friendship almost ended because seemed different to her friend. I remember crying as I read the sad parts. I’m 45 a d my memory is not as good as it was. I really loved that book. I’ve tried searching but no luck. Suggestion: The Trouble with Thirteen by Betty Miles