At what point is a dating preference discrimination, rather than just a preference? How do I know when I've crossed the line?

I identify as gay, but I'm more homoflexible if we're being specific. I'm not attracted to Neurotypical women and noticeably overweight/obese people. I also have a preference for lighter skin. Is this okay?
At what point is a dating preference discrimination, rather than just a preference? How do I know when I've crossed the line?
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