You don't have to worry about being self absorbed. If we weren't we wouldn't survive, think of a baby: he/she cries instantly in order to be nurtured.
When I was obsessed due to acute anxiety I thought of nothing else except me. It was only later when i realised how I might have come over to others.
Keeping a journal where I could rant, rant, rant helped - when I read it before shredding the pages 5 years later, well, had anyone else read it the big yellow van would have been sent for
. But it helped at the time to get the anger out of my head and body.
Yoga can help. It isn't all about bending into strange positions but will help calm the mind, enable the person who practises yoga and can be used in many situations. It means that the person takes time 'out', 'me time' if you like. I used relaxation tapes
but would usually fall asleep whilst listening to them with a cat on my lap.
One eventually has to take charge of one's own situation but it is useful to have people around who can ease the symptoms, by listening, making a cuppa, sitting quietly to keep the sufferer company. It is better not to use friends for this but a professional.