Are you still with [boyfriend X] ?
We've all been asked it, but I rarely hear it being asked of straight couples.
There is often an expectation of relationship splits in same sex couples. The fact that we have no formal means of being recognised doesn't encourage a sense of commitment, and I expect makes our relationships less valued. I certainly have been pissed off at weddings where my relationship has been considered inferior, even though it has outlasted many of those marriages.
And while I'm not sure about getting married personally, I'd like to be able to make that decision for myself and not have it made for me by a government or religious institution.