I had a big 3 paragraph post written out, then decided I could make the same point in one question.
If a big business, fundamentally conservative, right wing, gun toting, ecology destroying, war mongering republican politician emerged on the scene and promised equal marriage rights for the LGBT community, would he get the LGBT vote?
Fact is Obama knows your vote and your money isn't going anywhere, he's more interested in placating mainstream America. That won't change until the LGBT voting block gains a higher percentage of the population, or produces their own candidate to take away part of the Dem. voting base. It's unfortunate, but it's the truth. Being a vocal minority has gotten you about as far is it can, it's time to do more.