My girlfriend cheated on me multiple times

Sup I'm Jason I'm in highschool and I met my ex-girlfriend "mia" we started dating in February and broke up in January of this year so this was yesterday I posted a status a happy birthday post for my other ex Rosa so I posted happy birthday Rosa my ex mia replied by saying " just date her " I told her that we were ex's and how I had cheated on Rosa with her she sent a sticker laughing she said that she had cheated while we were together she cheated with 20 guys and 35 girls so 55 people then I just replied " noted " so I blocked her and deleted her number then I saw a picture of my other ex girlfriend Linda she had a glow up man an hour glass figure perfect c-cup , beautiful perky lips and sultry eyes this made my heartbreak even worse man I regret that she broke up with me but now I'm focusing on my self man