Life is ever exploring and it's the individul perception which differs.When a person forms an opinion like that it's difficult to pronounce judegement on it!
This is fallacious view arising from pseudo philosophical view that we have some purpose to live. You did not come to life out of your own free will. In fact. you got capacity to think and act a few years after birth. Hence, there is no meaning in 'purpose of life'. It is futile to look for 'reason to live'. You are just a tiny part of nature and should live according to nature.
There are too many philosophical views while the fatalist would argue life is predestined but there are other schools who support individuals to lead lives on their terms!
'How to live' is very funny question. You have nothing to do for continuing life. You have to do some thing to end your life. However this is unlawful. Our life is as much meaningful as sun rise and sun set. It makes no sense to pose question about meaning of life.
How could one thinks of such situation to arise in any part of life. I couldn't understand.
Come on ! you should fight with what ever you have. believe in yourself and work hard to get rids of such situation .
Try to get associated with social groups as the retired persons do since they suddenly after retirement get deprived off their jobs and start looking to engage themselves.If not try and help the needy people directly or indirectly through NGOs.
There is every reason to live. If you are not interested to live for self do live for others through serving them by joining a voluntary body or of our own.