Is this narcissistic or something else?

My husband is dropping a female best friend we’ve had for almost 10 years. He’s even telling me to drop her also. It started all because she invited me on FB to her daughters birthday party but neither her or husband said anything to my husband about the party even though I already told him we are both invited to this party. He said he doesn’t feel included. He compares his hospitality to others. For example whenever we have a party I invite this friend and then my husband directly contacts her husband to invite him also. I am confused why my husband is acting this way. Does he want attention, to be the victim? Or excuse to not go? Or is this part of abuse/narcissism? There are plenty of other things he does that is very similar to this. He is very dramatic over the most smallest things that normal healthy people won’t ever dwell on. He is a porn addict too and throws tantrums in his room by locking himself in the bedroom and stuck on the phone and ignores everyone and everything. He is about 300 lbs which probably related to his mental issues- finding comfort in food and alcohol. No physical activity. Maybe a genetic issue. He enjoys looking for drama or looking to be upset and angry with someone. He cannot live without belittling me or someone else. He is obviously not normal or healthy but not sure what to do to help him.