I can't say I know any gay blind people, but most of my contact with blind people is in a business setting, so it's not a subject that tends to come up. As for gay deaf people, according to one of my deaf friends, there seems to be a higher proportion of gay deaf men than you'd expect, but apparently there are fewer deaf lesbians.
Concupisyis, my heart goes out to you. I can sort of understand how you may feel, as I've worked with people who have lost their hearing or sight. I hope you've got a good support network and some good friends around you. It sounds like you've got a positive attitude, which really makes a difference. One of my clients went totally blind in his early 20s (retinitis pigmentosa), but has never let that hold him back. He's run over 100 marathons, cycled from London to Paris (tandem), has done a tandem parachute jump, enjoys abseilling (rappeling if you're on the left side of the pond), is a published author and runs his own company. He and his wife (who is also registered blind) put me to shame.