How to cope up with situation.?

This earth of ours has been in existence many millions of years so life expectancy of "three score years and ten" is extremely short.You must convince yourself that, though you may have been happy once, happiness, in this life, rarely lasts long. Your feelings of loneliness can only be camouflaged at the moment by paying attention to someone else in greater need and spending time and energy on helping them, Voluntary work may help. Good luck.