He's inconsistent because he's married, insecure, and fatphobic. His own behavior is right there in front of you. It doesn't matter if you or anyone else you know is the butt of the fat joke; they are by definition at the expense of all fat people, and you are one of them so it is also indirectly at your expense. He chooses to devalue people like you publicly for all the same reasons anyone (including and ESPECIALLY many fat fetishists) is fatphobic. Many people who fetishize and/or are attracted to fat bodies are angry about it and so you will see behavior like this.
It has nothing to do with you.
I've had two very distinct situations in my life that reflect what you're experiencing here and I can't stress it enough: he's unavailable and if that changes, it's not going to be because of you trying to do the mental and emotional labor for him.
You do not need to prove your worth to others who choose to openly devalue you. Maybe he really does like you! Maybe he doesn't and he's just confused and frustrated. Him being married makes it even worse and harder on everyone. No one gets out of those situations unscathed. No one!
But facts are facts and it's not your job to read his weak, stale tea leaves.
It has nothing to do with you.
I've had two very distinct situations in my life that reflect what you're experiencing here and I can't stress it enough: he's unavailable and if that changes, it's not going to be because of you trying to do the mental and emotional labor for him.
You do not need to prove your worth to others who choose to openly devalue you. Maybe he really does like you! Maybe he doesn't and he's just confused and frustrated. Him being married makes it even worse and harder on everyone. No one gets out of those situations unscathed. No one!
But facts are facts and it's not your job to read his weak, stale tea leaves.
3 years