How to overcome

So I want to share my this current feeling From the starting of this year I have been very productive that I was so proud of myself.... literally I deleted my social media and was so productive then that time came when I managed on event it was my first event of 7 days ...it was a wedding so I met lot of people there and made new friends.....I went there on Jan 17 and still now Im thinking Abt them...... literally each and every day I think abt the moments and all and the people just don't fucking get out of my mind ..... their was on boy with whom I started flirting....I mean why not....it was fun and everybody flirts ....it's natural...if u have mutual understanding then it's harmless ...but I don't know how to explain....when I was there with him....his behaviour was different but when I came here and started texting on social media ...I don't know but I found him behaving different....he have hurted me a lot...I have destroyed my self respect because of him and I want to kill the fuck out of him....I hate mens literally....I tried a lot to distract myself....I lost my productive habits and all that good routine I had just bcoz of that fucking boy.... recently he texted me and I have so savage replies and now maybe I'm moving on but not that much but yeahhh still now I think about that events and abt the members plz give me some tips so I can forget Abt them .....I don't want this....I shld be awarded for overthinking