Weirdly, I didn't lose any friends when I came out. However, it was when I took a stand against homophobia that my real friends remained.
An example was when I was at a party, where we were talking about our holiday travels. I mentioned I stayed at a friend's house for a few days, when a casual friend said, "So you sold your backside to him so that you could stay at his house."
I looked at him and replied, " This may surprise you, but gay people CAN have normal friendships with straight people with no sexual feelings involved. You might want to open your mind more."
Luckily there wasn't violence involved because
A) Everyone was glaring at him
B) I was 1.5 times his size. In muscle mass.