Don't be Sad
Resentment yields no return
Being resentful about one’s situation generally issues from two possibilities. Either it is caused by not achieving what one desires, or by the occurrence of what one hates. Yet if one truly believes that whatever has passed him by was never meant for him, and whatever afflicted him was always meant to be, then he has no reason to feel disgruntled. The Messenger of Allah, Muhammad (Blessings and Peace be upon him), said:
"The pen has dried concerning what you will meet with, O’ Abu Hurayrah. The ordaining is finished with, the decree is completed, the measure of things has been written, the pens are raised, and the pages have dried."