I can understand the your distress. Masturbation is not compulsory. If you are facing a problem of night fall, it is a condition that needs treatment. Masturbation has nothing to do with it. There is no harm in masturbating, provided it is done in a healthy way. You must consult with a sexologist for knowing a proper technique for masturbation. About your problem of nightfall, suitable medication and instructions can help you overcome it.
Next Steps
A consultation with Sexologist will certainly help you.
Health Tips
It is treatable.