Love is not definitely happy, while it does not mean unhappy without love.
As we all know that you’ll be more miserable if you care more. Comparing to the suffering from love, the happiness is very little and certainly unbalanced.
Love comes from eyes, while like from ears.
You could just cover your ears if you don’t like a person any more; but if you want to close your eyes, love will turn into a drop of tear
and drop upon
your 
heart.There is no distance between love and hate, but you can keep distant from both love and hate.