Physical pain also are unbearable many times. But as there are pain killer medicines available many physical pains are made bearable. Moreover by suffering repeated physical pains and injuries our tolerance level also increases in due course. Body also gets accustomed to it.
In the case of emotional pain also situations are more or les same. We have overcome in due course many such pains. Now we can even philosophise on them. The basic difference is that there are no such convenient and comforting pain killers for emotional pain. Here also there are some interventions available like stress busters, relaxants etc.
While we are learning from formal education or from other sources something about our physical anatomy, it is a sad truth that we do not know anything about our emotional(psychic) anatomy. It is still almost a dark area. That is why we could not find suitable pain killers for emotional pains.
It is here that human race has evolved some checks and balances like family, friends, society, community etc. The above added with common festivals, family events etc. are all cushions or shock absorbers for reducing emotional shocks or early healing of emotional pains.
Our ancient Rishis and Acharyas have given us so much such emotional balancers and stress busters like Yoga, meditation, prayers, collective bhajans, Satsang, festival singing, dancing, charity etc. etc. They have given us a lot of literature and text to know about our minds by' inward vision'. (antar drishti).
I would end with a joke heard. One person went to an astrologer for predicting his times. The astrologer said "You will be having very bad time for next three years." The man asked" after three years?" The astrologer replied" By then you will get accustomed to it and will not mind about it".
Time is the healer of most wounds- physical or emotional.