College
After high-school Jeffery Dahmer attended Ohio State University starting in 1978. He inevitably dropped out that same year.
The Army
After dropping out of college Dahmer's father insisted that he join the army. He enlisted in December of 1978 and was deployed to Germany. Dahmer had a drinking problem and was discharged in 1981.
Grandma
Dahmer was sent to live with his grandmother after being arrested. He was eventually kicked out of her home as well. That is when Dahmer finally rented his own apartment.
Loneliness
Dahmer never married and didn't really have friends. Just like when he was a child Dahmer was extremely withdrawn in his adult life. That is, until he would go to gay bars in search of his next victim.