What would life be without love and losses?
It takes time to recover and this time for mourning needs to be spent, but I don't like people dwelling in this state of loneliness without handling the issues properly, if there's a chance.
I agree with fresnelly; one should not get high with the feeling. I have noticed some people may even use the loneliness (when been left) as a shield of sorts - the relationship ended ages ago, but they can't get over it and move on.
Some people yearn to experience the falling in love over and over again. They don't even take time to have a broken heart, they try to mend it with another experience asap.