My friend, your current troubles are like itches. Think of your back. Sooner or later you will feel an itch there. 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.