A helpful thought for me was that literally everyone could reject you, except one person, and that's all you need is just that one person. Also along with that principle, maybe 99% of people actually aren't a good match for me, so if I mostly don't "click" with other people, that's totally fine — I don't know if I would want to be with 99% of possible people myself even if they were interested in me. It's just about finding the right kind of person that's similar to you. People with unique attributes may find someone else with the same unique attributes, or the other person may possess unique attributes that might somehow be a good fit for your unique attributes.