You went back to the flat without having established a proper relationship. You put yourself at risk, and you may have harmed another person very badly. You want advice, I'm someone who has been siccessful with my romantic relationships: what you did was wrong, going back to her flat was wrong at that stage in your relationship and you are now suffering for it. You can learn to spend time developing trust, understanding, and develop a genuine rapport with your next partner, or you can be arrested for raping someone when you go back to someone's flat again too soon.

Take your time, make yourself a better man, and you will find meaningful success eventually. Rush as you are, be demanding and entitled, and you may be accused and arrested for rape.

"I may sound entitled, do you know what? Maybe I am, because I am entitled to have as good as a life as any other person?" Not at the expense of others. What value would you have to your partner? What would you bring to their life? How would you make them happy and let them fulfil their entitlements over you?