Nah, Mel has always been emotionally unstable. He's doing to his forum what anyone with BPD also does to a real life friend or partner: subjects them to bouts of erratic emotionality, engages in chronic self-sabotage, and exhibits an equal mixture of unbridled aloofness and chaotic dependence in his relational style.
Mel has issues and, except through his excessive consumption of alcohol, is unwilling to seek treatment.
A fine, hot mess is Mel.
For me, though, that's what makes him so endearing. He's like a 10 year old at the wheel of an Indy race car and all of us are mere rubberneckers waiting for the crash.
Pass the popcorn, please.