I turned gay and im absolutley 100% depressed, will this last or can i turn back?

Don't buy into the gay politicos chant of "we never change." What one wants at age12 is usually very different from what that same person wants at age 22. There is a tendency for the change to become perverted but it can also go the other way. There is no need to label yourself. Relax and enjoy. I have a neighbor who did men while in prison. Now its women only for him.