I've been with my homie for about 11 months now. I'm out to all my close mates and my cousins, but he is not out at all. It works though because after a few months he trusted me enough to meet all the mates that know about me, so we can out with people and be ourselves.
Because I'm only out to a handful of people, I'm able to hang out with his friends too without them being suspicious of us being together (due to that fact that its not a well known fact that I'm gay)
There's definately been a lot of paranoia, a few close calls and a few arguments stemming from the fact that he's not out at all. But its definitely working for us because we know eachothers boundaries and have trust in eachothers judgement. Most importantly we make compromises and sacrifices to make it work.
We understand the positions were both in and see how it can be hard for both of us, so, although it can be frustrating at times, we've learnt how to deal.
I guess it helps that I'm not out to my immediate family, it takes the pressure off.
From this point on I hope one day he finds the courage to let his friends in, but if it doesn't happen then I'm content with that.