Let me give you some advice:
1. Set a time where you are NOT supposed to do it. For example, not reading yaoi after 9pm.
2. Slowly decrease the amount of times you do it. For example, if you read 6 hours a day then the next week read 5 hours a day and the next week 4 hours and so on.
3. Pick up a hobby or do something you like. For example, draw......
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