CC, Some don't take it any further than an EA and others, will do an EA and then jump to a PA. Some have multiple PA's. We never know which ones will do the full blow PA's. We just have to hope that what he really needs is the flirtation to satisfy his need for attention.
I wouldn't worry too much about him getting through his MLC. What can hold them back is if they don't have the time and space to focus on themselves, i.e., grow up from the age that they were emotionally stunted. If you can give him all of the time and space he requires, he may be one of the lucky ones to make it thru completely.
You don't know what the future holds for either of you. Live in the present and take each day as it comes. Look for at least one good thing to smile about each day.
Be patient and above all else, take care of you. Okay?
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.