How to deal with loneliness and how to be productive?

I have been suffering from lonliness and I started to feel that my life is useless, I don't have any reason to live for. I don't know what should I do! and how to depend on myself again! I feel like I'm unloved and unappreciated.
I feel that everybody hates me and I started to think about ending my life cause nobody cares about it.
P. S. I go to a therapist and I'm taking anti-depressants and meds cause I'm suffering from a mental illness 'Paranoid Personality Disorder' PPD. I started to overcome that mental illness but I started to feel that I'm so lonely and sad, what should I do to fix that?
Back then, I used to cope with lonliness and I used to prefer being alone but now I can't even bear that! I feel like I'm a burden and I can't be productive. I wanted to learn graphic design but because of that lonliness I can't find any reason to learn anything! I mean what would I learn that if I have no person to encourage me or even to improve myself for?
How to deal with loneliness and how to be productive?
How to deal with loneliness and how to be productive?
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