I hope you do well and get on and get your dream flying Job, but I would not ram your sexuality down peoples throats....... pun NOT intended..
Seriously, as with all things in life, a few people as you have seen get on their high horse when something like this is brought up. You also may as with all things in life run up against the odd bigot in th RAF, so get yourself through all of your training etc first and go from there...
Myself, I couldnt give a damn what anyones sexual orientation is, I have several friends that are Gay, but they do not make a point of broadcasting it to the world..... maybe till you are sorted that might be the way forward, unfortunately as we see in this equal world, not all things are.....
After all not everyone walks into a room like Lord FlasHeart off Blackadder and announce to the world they wish to shag the pants off every woman present....