What makes people gain weight after a breakup?

Anonymous
What makes people gain weight after a breakup? My last girlfriend broke up with me and told me to move on and has gained a ton of weight since. It surprised me. I thought she would do the opposite because she wanted to "find a better guy."
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Many of the responses are the same. That she is depressed and needs time to get over me. It's kind of interesting because I thought she was over me. I thought she broke up with me because she didn't want me anymore. So this leads to my next question. What makes women break up with men without an explanation and then be depressed about the breakup? If this is so hard for her, why did she even push me away in the first place?
What makes people gain weight after a breakup?
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