I see this thread is old so I don't know if this movie was mentioned:
Summer Storm. A german movie about two boys in their teens who are best friends. One is gay and the other is not. The story is about how they deal with their sexuality, ideas about it, and their hormones! This is a nice, light movie. I had a good time watching it.
http://www.imdb.com/title/tt0420206/Also Amodovar's movies such as
All About My Mother,
The Law of Desire,
The Bad Education, deal with homosexuality.
About the movies listed:
Before Night FallsI didn't like it. I loved Bardem's performance but the movie was too depressing. I know Brokeback was too, but in a very different way. I had nightmares after watching Before Night Falls.
Walk on WaterI liked this movie but I don't think it's really gay related. One character is gay but the whole plot has nothing to do with homosexuality in itself. I thought it was more about dealing with the past, with Hitler and the holocaust, and what it means for the characters.
The Wedding BanquetI loved this movie. I thought it was a beautiful love story not only between two lovers but also between father and son. Well done and well acted too.
Yossi and JaggerThis movie was good, too short but good. It's a bit similar to BBM, not that profound but similar. No cowboys or horses there, though.
Y tu mamá también.Its simply one of the best road movies I have ever seen. But I'm not sure if it's really gay related, although it could be.