Belly fat, tired and masturbate each night! Somebody help me

There's no easy answer here. In fact, I'm pretty sure you're going to really dislike my answer. So if I understand this correctly, you're essentially asking how to not choose to masturbate at night. This is a decision that you make. I understand that its an addiction, and that's exactly why there are so many resources devoted to fighting this it! There is a 12 step program called Sexaholics Anonymous, there are videos about porn and lust addiction, articles to read, podcasts to listen to, books to read, therapists to talk to, and more. You need to reach out for help, because help will never come to you. You can't just pray your way out of this, and trust me, you'll never just wake up one day and not have the addiction anymore.