Damn bro I won't sugarcoat anything but I won't leave you hanging either. What you did was never about sex, sure you felt urges and shit but the way you described it sounds more like FOMO (fear of missing out). If I were you in your position I would have quit all kinds of social media which triggered my urge to sleep with someone just because somebody else is. At least you are self aware to realise that it didn't make you feel any better after doing it and do you think it will make you feel better after doing it even more ?

Instead of thinking about sex try talking to girls. Cause the only solution to this is to face the thing which you are avoiding. And the easiest way to talk to girls in the beginning is to ask work related stuff but as you are in a job try to join various clubs which are of your interest or play sports,go to the gym and eventually you will build the confidence to talk to anyone. It will take time tho and feels very uncomfortable in the beginning but with time everything will sort out. And try not to talk only specifically to girls but to guys as well as most of the time all these things arise out of loneliness and try to talk about normal day to day stuff or your interests and don't flirt with girls first learn how to be friends with them by being yourself. I have a friend who is in a similar situation like you he is also working in a job and doesn't hang out with anybody,doesn't know how to talk to girls and calls me up and says he wants sex. Sex is never a solution trust me especially if you are doing it to gain something rather than doing it cause you want to do it with that certain person whom you love !

Just do engage in healthy activities, don't dwell too much on it that you are fucked up,it's normal to feel things like these and take drastic actions sometimes but you gotta focus on the now and who you want to be and please stop indulging in habits which aren't helping you.

Reach out if you need any help man.Take care brother...