I think because clay was someone Hannah loved and if you heard his tape you can hear her say she wished he had turned around and stayed with her

I think it’s because Clay never told Hannnah that he loved her. I know he tried, it’s pretty evident, but it was too late.

He broke her heart they were all bad things

He did nothing wrong to her. She just put him there so that he could hear her story. To understand why she did why she did.

I think the reason he was on the tape was because Hannah saw a rape and was raped that she was traumatized from it. When Clay came in her to give her a little nookie, it triggered her.

Yeah I think that is true! Its terrible that this happened to her

I agree with @Lena gomez and @TheQueenManon