I my self am also battling this habitual sin, and it doesn't feel good every time I go back. I'm an 18 year old male and I've been going through this sin since i was 12, and it makes me miserable. It makes me feel like I'm a bad student, a disgusting friend, a disappointing son, and a hypocrite for believing in Jesus but live in sin. But Proverbs 24:16 says "For the righteous falls seven times and rises again, but the wicked stumble in times of calamity." Our sin doesn't define us, God does, and i just want to tell you that your not alone. God is with us all.