Reasons for suicide

Hey everybody,
Do you know some reasons for suicide? I don't know, but the book "Thirteen Reasons Why" tells the reader why Hannah killed herself. So now I know six reasons for her suicide and of course it is understandable that she doesn't feel good, isn't it? But do you think these things are reasons for suicide? I absolutely don't know because I am not Hannah Backer, but I try to understand her.
Everything starts with the rumor that Hannah is a"slut".These rumors were told by Justin and there was a snowball effect. The rumors are only the base of her problems.
Cassette 3b is about Markus who meets Hannah because of  "oh my Dollar valetines". He touches Hannah but she doesn`t want it. The Problem is that he doesn`t stop doing this. So she throws him on the floor,but he doesn`t feel sorry. He only calls her a tease and then he walks out. I can`t understand his behavior. Do you understand it? I agree with Hannah that her life isn`t easy and I absolutely understand her point of view, but in my opinion these aren`t reasons for suicide. She could talk to people who can help her and maybe she will be a little bit  happier after the talk or she also could change the school. So  she could start a new life without rumors and maybe with real friends. Another point I`d like to add is that I can`t understand the behavior of Markus during the meeting and after the meeting as well.
Do you agree with me?