Sadly, I would also probably need to give up my dreams of visiting Xizang
Why? There's a difference between living somewhere and visiting as a tourist. Most places in China are very welcoming to tourists. Are you worried about the permit? As far as i know getting a permit to visit Xizang-Tibet nowadays is fairly easy if you just book with a tourist company that has a lot of experience organizing trips and can handle the paperwork for you.
Even in rural areas as a visitor you would encounter much less discrimination or hostility toward your identity than a local who is queer would. Conservative attitudes mainly target people in the community through family pressure and social expectations. Outsiders can have an advantage in this dynamic because they are not subject to the same expectations.