I suppose it's all to do with how "hungry" you really are. If you're happy with what you've got and there is no "food" out there you fancy, you can stay on your diet. The day you really become hungry, hopefully, you'll recognise it and find something to eat.
I know this is a metaphor. But I think that's how it is at the moment. Having high standards is nothing like being shallow (on the contrary). I think one can have high standards (in terms of beauty, chemistry etc...) and yet live a fulfilling romantic life. That's what Cinderella is all about, isn't it? But Cinderella is also about accepting that someone you love may look like a servant girl. It's finding the gem in the servant girl that's important to your happiness, the one that the glass slipper fits.
It sounds to me, Tombo, as if you haven't yet found the man that makes you go looking for him, even among the servants. It's not necessarily a questions of beauty, and if it is, then maybe you are shallow. I'm guessing you have talked and interacted with all these people at the LGBT centre now, and know them enough to think that they are better off as friends. We need friends too. No boyfriend material there. Maybe your future partner is somewhere else, maybe somewhere where there is confidence (confidence is sexy!
mile
and no need to cling to a group of like-minded people? The LGBT centre is fine for some aspects of your life that need to be covered. And then again, you never know, one day maybe Prince Charming will come walking in, needing the group too and you'll fall madly in love? The random aspect of life. So don't give up hope, but start looking in other places, as well?