Why should a girl dump a guy?

can someone please give me a number of reasons why a girl should dump a guy?

Here are 10 reasons just off the top of my head:

1. He cheated on her
2. They have no chemistry
3. She likes someone else
4. He is disrespectful
5. He is pressuring her to do physical things
6. She's not over her ex
7. He's too immature
8. Her parents don't like him
9. They don't spend enough time together
10. She needs to focus on her school work