Has A brought this issue up with B personally before?  If no, then I think it is better for A to express his concerns with B personally rather than with others without B's knowledge.  If B appreciates A's concerns and wishes for A to help him with the application of the teachings, then A would need to help guide and support B.  However, if B stresses that he is fine and does not need A's help, then I think A should respect B's choices and let it rest.  There is no need for A to be worked up by B's issues.  If B refuses to listen to A, then A would need to work on elevating his own frequency and energy potency, so that he can better support B if he goes into crisis and needs help.

There are several ways to look at this issue. Firstly, this is a personal lesson for Practitioner B to evolve and build energy potency. Second, it is a lesson for Practitioner A to allow and not interfere with that personal lesson and learn to elevate his frequency to enable him to express love to Practitioner B when the opportunity arise and support is requested. Agree with Jennifer that there is no need to be worked up as it would create depletion of energy on Practitioner B's part. This move will observe the law of free will and prevent build up of contamination on Practitioner A's part. The final perspective that comes to mind is how the collective team respond to this issue. Will they use the lens of the past to view Practitioner B and deem him as a lost cause or see it yet another opportunity to raise group consciousness so that the group field is strong enough to protect Practitioner B and all others from harm when the time comes. Believe that this could be an important perspective since it allow the building of the 3 principles muscle in a group cultivation practice.