my ex bf broke up with me.

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he broke up with me for my mental illnesses (depression, anxiety and panic disorder) he said he couldn’t handle it all anymore. i don’t understand because i was an amazing girlfriend and person i did anything for him he said he “just wants to be single” and now he’s going around having sex with girls and their “friends with benefits”. i’m really sad. idk what to do. i need help.. idk how to get over him and it been a month and a half since he broke up with me