The minutes of mood swings, seems like more than bipolar. My comprehension (please correct if wrong) is bipolar swings good for days, weeks, months. Co morbidity with a cluster b, is possible.
The strong push, pull denotes, give him space, exert your personal boundaries of not being a participant. He seems to need more therapy, if he's feeling lost and hopeless.

Don't participate, in it, is my advice.

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