I don’t get it honestly

I swear I try and try and try , I’m always the one who initiates , who sends out flirting texts or try’s to make moves in the bedroom , what am I doing wrong when we have sex she begs me to eat her all night and I happily oblige. But then it’s another 3+ weeks of me trying and practically begging just to get not tonight, tomorrow , like what am I to do ?!