does anyone else get the urge to self isolate

i'm severely depressed & lonely. and that loneliness just worsens my depression. which in turn worsens the loneliness. but sometimes i get this really strong urge to just block everyone out. even though the loneliness is driving me crazy. idk what it is. it makes me want to delete all social media so no one can text me (not that anyone really does anyway). i think it happens following a breakdown when i cry really hard. not sure. it makes me wish everyone would just go away & leave me alone. that everyone would just disappear. i don't want to be acknowledged or talked to. why does this even happen