If life's meaning is to survive and p on our genetics, then what am I here for?

I have always had that same belief, and I know it can be quite crushing sometimes. You don't want to delude yourself with idealistic "meanings of life", but you also want to believe there's more to it than birth, , and death. In your case, it must be even more difficult, but you have to remember that being attracted to men is no different than being sterile in the sense that you are unable to produce offspring. There's simply nothing you can do to change yourself, and why would you want to? I suppose you must make a decision: do you continue on the way you are living, happy but without that sense of fulfillment; or do you fulfill the meaning of life, but be unhappy with your female partner? When it comes down to it, procreation may be our fundamental purpose as a species, but we have evolved into sentient beings able to ponder our existence, and therefore things like our own happiness become more important. The new meaning of life might simply be to have fun and enjoy the 80 or so years we have on this planet, and spend them with those we are most comfortable with. Truth be told, the world is quickly becoming overpopulated, and we could do with a few more people like you!