My daughter would report similar things. Here are the problems I ran into.
Because my daughter was often the cause of problems, and classified as special needs, the teachers and staff often were doubtful of what she was saying. So I needed to stress, wether or not something was happening, this is what she perceives to be happening, and is acting out because of it.

Sometimes she did make things up, so there was always a mix of truth and fantasy.

One of the boys that used to tease her, she now actually likes, as it was a crush on his part all along.

That being said, You can request they not sit near each other, and have additional supervision between them when they are near each other.