There you go. A stable, partnered relationship that patterns adulthood tells gay kids (and gay men) that yes, they have a future. That being gay isn't something that has to be hidden, or dirty, or anonymous, or promiscuous. That's why our opponents are so against marriage equality. It never has been about marriage--it's about their desire to make us ashamed of who we are, and making us hopeless.
I feel blessed that I recognized my own attractions. Though I resisted my impulses through high school, I knew that when I was ready I had someone to turn to: my uncle Mark in New York. I knew we could talk without judgment, and we did last summer. Uncle Mark is gay. He and his partner have been in a stable relationship forever. For a confused young boy, I can think of no better role model of love and compassion.
That's why it matters. The lies they are telling about gay people melt away when they are faced with Uncle Mark and his partner.