I'm going to tag on to Jack's comments at the stages. They are just a guideline to help you better understand some of the behavior. Do not take to heart any of what you read about how long each stage is. Why? Because each and every person is unique, they have different childhood issues to deal with as well as their coping skills aren't that great. Each stage, between bouncing around in some of them at one time or another, they will take as long as they take for each person. Also, the 3-5 years for the crisis is just an estimate. Some take longer, others a shorter amount of time and then there are those that are stuck.

I also want to point out, that if they do come thru the crisis, they can: 1) return as the person you knew, but much more settled/mature; 2) can return w/some of the MLC traits still intact: or 3) be a totally different person, some may good and others not good at all.

Again, it takes time, the MLCer is on a very, very slow clock and they will finish their crisis only when they are ready and possibly have faced their issues. Until then, live your life to the fullest, treat each day as a new adventure and at the end of the day, be thankful for being alive and have the opportunity to see each sunrise and sunset.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.