I (23M) have lost a huge amount of weight and my girlfriend (22F) gained a bit of weight. We ended up breaking up due to unrelated issues, but she told everyone that I 'bullied' her for being fat and now everyone thinks I am an ******* because of what she said.

I went from 230 lbs to 165 lbs and then gained a bit of muscle. This was 6 months ago, the process took about a year. I dated Kate for 2 years.
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While I was losing weight, she slowly gained weight. Idk the exact amount, maybe 30 pounds at 5'3. She became very self concious about her weight, and I think part of her resented me for losing weight and getting sort of buff while she was gaining weight.
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Anyways, we broke up. We were getting into arguments too much, and she kept getting suspicious I was cheating on her to the point where she was following me to and from work. She started drinking nearly every day, gradually getting worse as time went on, and she is a cruel drunk so that was extra bad. She also was taking a lot of xanax. She accused me of lying all the time based on nothing. She just sort of got... crazy, and I felt like no matter what I said to her, she resented me. I don't know where the resentment came from, but it just built up over time. I feel like her weight gain and my weight loss might have something to do with it but I am honestly not sure. Near the end I tried to say as few words as possible to her in general to avoid her getting mad at me.
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Anyways, when we broke up, she went on a facebook rant about how she hates me and all the men in her life are awful and all this stuff. She kept on mentioning that our relationship was toxic and she wanted out so badly and she feels 'free' now that she broke up with me. That was sort of the first warning sign. I broke up with her, not the other way around.
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Anyways, quite a bit of time went by, and a friend showed me a post she made on twitter that said "when your toxic ex boyfriend bullies you for being a short fat girl for a year and makes you feel depressed but your still fabulous" and then a bunch of other posts about how I was a bully and I was mean to her. One of the posts was "eric (thats me lol) lost a bunch of weight and suddenly thinks its okay to lash about and emotionally abuse me for being fat even though he was fat just a few months before." She has a very, very popular twitter, so this blew up pretty quickly.
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Then she dropped a bombshell on both facebook and twitter the next day, saying that I was abusive and 'ruined her life' and that she never wants to see me again, and that this is a 'warning' for other people who are friends with me that I am abusive and awful. Suddenly I got a bunch of texts and messages from people saying that I was an ******* and that they thought I was a good guy but apparently not etc. I got invited to a party, and the person who invited me had to text me saying I couldn't go anymore because a few girls complained that I was going and they didn't want me there.
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I had to make a facebook just for this, and I posted that what she said was lies and that I would never do something like that. But... well, I only have 9 friends so far considering I just made the facebook. The past few days have just been me dealing with the backlash of this.
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The worst part is that now its really opening my eyes the level of hatred she had for me. I mean I lived for months in fear that she was going to just go on a furious outburst at me over nothing. I can't believe I stayed with her during those times. I should have seen this coming. She bullied me, not the other way around. Looking back at how horrible and frankly terrifying her behavior was... ugh.
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I'm not really sure what to do. I am kind of a shy timid guy (thats what comes with being fat for your whole life..) and I try to avoid controversy as much as possible and now its come to my doorstep.
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any advice?
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TL;DR - - Me and my girlfriend broke up and she wrote a post saying I bullied her for being fat.


Source.