The Mid-Life Crisis/Transition
"Midlife transition" is a natural stage that happens to many of us at some point (usually at about age 40, give or take 20 years).
Midlife transition can include:
Discontentment or boredom with life or with the lifestyle (including people and things) that have provided fulfillment for a long time
Feeling restless and wanting to do something completely different
Questioning decisions made years earlier and the meaning of life
Confusion about who you are or where your life is going
Irritability, unexpected anger
Acting on alcohol, drug, food, or other compulsions
Greatly decreased or increased sexual desire
Sexual affairs, especially with someone much younger
Greatly decreased or increased ambition.
For more information, go to http://www.psychologytoday.com/conditions/mid-life