Some people think he WAS gay.
A faction of the early Nazi Party was without question homosexual- led by Ernst Rohm, leader of the S.A., the Sturmabteilung, the Nazi street army.
This was the bunch murdered in the Night of the Long Knives, that removed Rohm as a potential rival and cemented Hitler’s power as the leader of the Nazi Party.
Hitler knew of Rohm’s homosexuality. And Rohm was one of the very few people who could address Hitler by his nickname, so they were close. This is one of the reasons that some have suspected that Hitler was gay.