I know it is stupid and that women play with and friendzone men all the time, but I still can't get over the feeling that I am doing something wrong when I interact and flirt with women with the intention of only having sex with them or a fuck buddy type of a deal, nothing serious. I don't want to have anything serious with anyone for a long time

I know i dont owe anyone anything but I still feel bad dashing a girls expectations for no reason. How do you deal with this problem?

A bit of a background on me, I am a 20 year old who has had an oneitis for 3 years, the girl outright rejected a relationship with me and I've been doing a monk mode type of thing, improving myself. Now i am looking for banging 10 others chicks for recovery, as it is recommended ( and also because my notch count is way below that)