Hi SY and welcome!
I am in the same boat with you (even though I am much older) and I understand very well how hard this can be. I came here last year thinking I was the only frum homosexual out there, and when I found that I was not alone it was the greatest Chizuk. And having others to share with, and who understand and accept my struggle, has been one of the most important tools in working towards change.
As Alex already pointed out, just because we have same-sex attractions and it seems that it has taken over our whole life, does not mean that we need to accept it as our identity. As deeply as it may be ingrained, whether we were born this way or our environment growing up made us develop it, it may be what we are drawn towards, but it is not WHO we are! We do not need to take on the label that society wants to impose on us, to convince us that we have no choice but to give in to our desires. Hashem gave us Bechira, and we can choose to define ourselves by what He wants us to be. He gave us this unusual and powerful test, and He wants us to do our best to live up to the challenge. So the title of your thread says it well, fighting the "gay identity" is one of the major keys to this struggle.
And the obsessing and fantasizing and acting out, that is really no different that what all the "straight" guys here have to deal with. Same story, different pictures. We're all fighting the same battle. So browse the site, read the handbook and the tools, sign up for the emails, and most of all stick around and participate! Together we will Truck!!!
Gevura!
P.S. If you want to see my whole story it's here:
http://www.guardyoureyes.org/forum/index.php?topic=4125.0