love and caring is suffering In my point of view everything we love finally ends up with sufferings. love is a root to suffering. But in the society there are plenty of people who lead very happy and non-suffering lives with love. But the people with full of honesty mostly get cheated and suffer their lives. So why is this world seems to be unfair ? does it completely depends on our PREVIOUS BIRTH sins and merits ?
It is true that worldly love finally ends up with sufferings; that worldly forms of love is a root to suffering. The only people without suffering are enlightened people. It may appear in the society there are plenty of people who lead very happy and non-suffering lives with love but this appearance is not true. 

If the people with full of honesty mostly get cheated and suffer their lives, how can such sinlessness (honesty) be the result of previous sins &amp; merits? Such an idea is illogical.

People with full of honesty get cheated because of acts of evil people. 

If I am a good person &amp; an evil person wants to murder me, how can I stop this? I cannot.