And once they start, new ones keep popping up. I have one on my shoulder blade, it started as I began typing this sentence. Emotional itches are the same. They are generated by us focusing inwards on 'me, me, me', and they keep breeding and growing. Once you have read Frankl's book, you'll understand what I mean.
People CAN be joyful and happy.
The secret, if you can manage it, is to stop worrying about it. You are lonely. You don't want a sexual partner, and that's fine, but you need company, the friendship of other people. You are a ship adrift, with nowhere to sail to. All you are doing with your life is making money and worrying about your mental health.