Lover is not an inanimate object like furniture that has been taken away by some one. the relations are temporary and subjective. If lover gone with some one, the relation simply ends. No need to bother.
Deepti Everyone has his own interest so some person may love this topic some may not. So you response as per your interest. I did not force you to reply.
In my views, if he/she has gone to some other person by his/her will, then why one should bother about that person, who didn't bother about you.
If you want your lover to be happy and remain happy forever then let her/him take his/her own decisions. And one should not spoil his/her life thinking about that fellow.
I'm happy Santosh- You liked the way Astha explained. Style of expression differs from person to person. However, all have expressed the view that love is not a one way traffic. If your lover deserts you, there is no way other than to close the existing relation and go ahead. As some Urdu poet remarked- 'Tu hai harzai to apna bhi yahi daur sahi- Tu nahin, aur sahi- aur nahi- aur sahi' meaning- "If you are faithless, I shall do likewise- If not you- someone else- If not someone else- someone next"