To be fair, he once had a male friend: Andy Biersack, Black Veil Brides singer.
It was a very short lived friendship that Biersack probably considered simply as a collaboration, especially seen the fact that he cut off all bridges with Greg as soon as Greg began showing himself for the narcissistic idiot he truly is.
So, after Biersack refused to acknowledge Greg and collaborate with him because he was on tour with his band, Greg pulled a tantrum similar to the ones he throws for Shane and insulted the singer, his whole band, his fans, and concluded with something like "You're stupid and ugly, gnegnegne!".
Also, this happened at the height of Greg's career, and everything came tumbling down a little after.