Justcoping, welcome to the forum.
I can feel your pain in your words. It must be so sad for you.
I have lived with bipolar for over 40 years and have either been rude and mean to my family when manic and pushing everyone when depressed. I have also moved away when manic only to come crashing down a month later.
During a depressive mood it's not uncommon for someone to withdraw into themselves and maintain little or no contact with their friends or family.
They feel they aren't worth your time. It also takes a huge amount of energy being social when they are in a depressive mood so again they are less inclined to speak to you as much or at all, particularly if it is combined with low self esteem or feelings of feeling like being a burden.
During this time it's best not to pressure him too much as it can be confusing, rather send him a simple "Hello,I'm thinking of you, I'm here if you want to talk" .
Hopefully He will come to you in his own time.
f you are worried about his health do you have a support worker or GP to contact.
