Excessive isolation despite/especially in the company of others, a feeling that you are a burden on everyone around you, complete distortion of your perception of others' perception of you, severe depression and anger with yourself and all your inadequacy, etc.
But mostly, a feeling like you can't go on and that there's nothing to live for.
That was me a few years ago.
#m=image%2Fjpeg&dim=350x331&blurhash=%7CBExnh%25N4T9FOWEgoeI%3BS4%24%7E%24%25t8s%3AIVNHt7R%2BNG00M%7B.8%25MM%7BR%2Ct7WAV%5B%7Eqx%5DD%25IUWXsoofofjZ_MxuD%25D*%251jbR%2Bt7ay4mIo%25gtRs.s%3Bn*adayIUNHt7t7WBe%3As%3AWCo0_3tRD%25RPayM%7CbIxtWCWBoLofs.NHxaWCR*jb&x=a0cc38c97f3829600b23eefc27aaee5aef9116a2f4a76dc06497fff050e2e6fc