It's pretty silly to think that homosexuality is a choice.
It's silly to think it's something other than a choice, because logic dictates that it IS a choice.
I'll spell it out for you so you might understand: You choose who you are with in romantic and/or sexual encounters. In any kind of normal circumstance, no one forces you to choose who those people are.
If you're with people of the opposite gender, you're "straight". If you are with people of the same gender, you're "gay". If it's both, you're "bisexual".
It's not a hard concept to grasp, but there is a major propaganda push to make it seem like none of these choices matter when in fact they are all that matters in determining sexual preference.
People don't "choose" to be homosexual any more than people "choose" to be attracted to other aberrant sexual behavior such as pedophilia, necrophilia or beastiality.
Or are those merely "choices" too?
Of course they are choices - the same way any action you take is a choice you have made. I'm not sure how you don't get that because it's a simple thing to understand.
Desire or attraction means absolutely nothing despite the propaganda I'm sure you've heard - your actions are what matter.