Well, he's not really my friend, but my cousin. He's a smart kid, and he's generally quite open minded and agrees with me on most things, except for when it comes to LBGT topics, I've considered coming out to him in the past but I've always thought it was best to test the waters before diving in. Every now and then I try to discuss lbgt stuff with him when the opportunity arises, like when we see something lbgt related on the news together, without giving it away or making it too obvious that I'm someone who belongs to the lbgt spectrum myself, and with the hopes that he'd have learned something since the last time, but to no avail.
I try to educate him, he's pretty dismissive and it seems he doesn't want to learn, and he doesn't want to hear opposing views, because it's kind of 'taboo' to him. I wish he'd see things my way, but I don't know if it's right for me to try to influence his beliefs, even if I think I'm guiding him in the right direction. Maybe I should let him decide on his own and hope that he learns someday.
Personally it does sadden me, if I weren't trans (or person with GD or whatever), I would've never known this side of him since I never would have been curious to know his opinions on this subject in the first place. He does say some pretty awful stuff sometimes, but I don't think he's a bad person at all, because I know him quite well. The only thing I've learnt from my cousin is that you can be perfectly rational person about most stuff and still be ignorant about people with deviations from 'standard' or normal gender identity and sexual orientation.