Honestly, I don't blame her for removing you. It sounds like a casual online friendship more than a friendship.

She doesn't sound like she's getting back at you or trying to cause you pain - she simply removed you from her accounts and she did that quietly without bothering to insult you.

Really now. You insulted her by commenting on her weight. That totally objectifies her - even if you don't view it as such, you made it fairly clear that her appearance is what matters most to you, or you wouldn't have commented. Congrats - you made her an object. Trust me, if a woman has been gaining weight - she knows about it. She does not need someone to point it out or tease her. We spend our entire lives conscious of it.

I know I sound harsh, but really, you seem to be thinking that you're the one who has been treated badly in this situation. She doesn't owe you forgiveness or an explanation even though you've apologized - you should never have said it to begin with! I joke around tons with my male friends.... And no one, ever, has commented on my appearance at all. Even when my male friends are teasing each other, when it comes to appearance I'm NEVER at the brunt of those jokes. Tons of other jokes, but never how I look. And I've never had to tell them to leave that topic out - they all just know that it's not acceptable.