I'm thinking about...

1. You

2. My past

3. You

4. My memories 

5. You 

6. My brothers addictions

7. You

8. My failures 

9. You

10. My problems

11. You

12. My sadness 

13. You

14. My mistakes 

15. You

16. The reason why I'm writing

17. You

18. The reason why I'm happy

19. You

20. The reason why I'm living... 

You