It seemed like life was made easy for you back at the hotel with your well plaid multi target approach/ pre sellection. I think it was great you presented yourself as a social guy and talked with the 3 girls, although... it seems like Alexa ran game on you

... It seems like she was the one running game and she was the one who pick you up, not you. NOTHING WRONG ABOUT IT! You pretty much opened all girls, you were playing your game and you kiss closed ... GREAT! But lets look at the facts: Your main target was not her. Alexa took you away from her, isolated you, and got you to not have anything with the girl she didnt like. Alexa even controlled you by seating on top of you, kissing you gently, and even started talking witht the other dude. I would risk to say that it was a win/win situation... but i this that she played better game than you did.
You have to control your self. Not saying what you did was wrong, but you made your life harded. If i was you, as soon as i got inside the appartment, i would gently keep my distance from Alexa in order to be able to still game my target, specially now that my confidence would be high!
Keep something in mind... girls play games too, and we tend to fall for them way toooo easy! Keep that in mind.