Nathan has always been really healthy, going to the gym on a daily basis, drinking and eating healthy, playing sports. Ever since you met him, he was always against alcohol, smoking, drugs, just anything that damages his health. But lately he started hanging around the wrong people, leading to drinking and smoking. He soon stopped caring about his health, causing him to gain weight and develop a drinking problem. Each time he got drunk, he would come bt at your house. But only when he's drunk.

"Why would I stop hanging with my friends? They don't nag me and are better than you!"

He yells at you after you decided to talk to him about it. His cheeks were red, his words slurred, meaning that he's drunk.