How to get over this numb feeling? how to get over breakups?

I recently got cheated on by my girlfriend who we been together for 2 year my life was going sooooo good and just noticed a change and decided to check her phone she willing gave it to me and looked around and I gave it back to her and she said word for word “you don’t like what you see don’t you” and I don't know I can still hear and feel the feeling of what I felt In the moment honestly don’t remember what happened after that but we broke up we had are ups and downs but what relationship doesn’t expect the person to hold it down as I am 3 days go by and I still have unfinished words words that still ache just want to know why she told me the bs story and how they met before and reconnected she explained to me one thing lead to another this whole thing happened in one week this is what she told me me being me still hurt I ask if she enjoyed it she said yes that hurt even more just don’t understand she cheated on me for a guy who just wanted to fuck and was way older then both of us I’m 17 at least 24 she explained to me he had his own apartment just was shiting on me to sim the rest of the story up I got information from her friend who’s now not friends with her that he was giving her money and he was her sugar daddy mind u money was never the problem with me anything she asked I gave for the past 3 weeks I been ok smiling laughing bout the situation but lately I been feeling so numb I try doing things to distract me try talking to other girls try putting myself out there lately just been feeling
How to get over this numb feeling? how to get over breakups?
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