Hello Mudcakes, a difficult decision to make, when that's exactly what you want to do but scared of the response you may receive.
If I can just say and understanding your predicament, does a person make a comment about someone they are keen on dating on any social media, it usually backfires against them, losing any chance of that person and them actually going out, simply because rumours begin making the situation very awkward.
People will learn to know how you are feeling by the general comments you've made because if you make comments on any social media, there's a chance you might lose friends you thought you had.
You're proud of being who you are, there's nothing wrong about that, but I would keep it at a low level, word and mouth will slowly spread.
If I said at school that I really liked my best mates girlfriend, for instant, then much could happen that I didn't want to happen.