X was her friend in preschool and for the first term of reception. They were inseparable.
He then realised she was a girl/realised she is a bit quirky/was a 5 yr old boy - I dunno, but whatever, he decided the friendship was over.
12 months on she is still upset by it
I don't know what to say, how to fix it, or generally how to make my baby feel better. She has other new friends, but none with that same passion.