oh I know what this is

(dont quote me on it though its just my strong opinion)
She can still see through you as you are quite newbie to the game.
She knows full well that you are looking at other women as maybe you scan the room when you are with her. She is gaming you back.
She is manipulating your feelings and
causing you to feel guilty, that is the reasons behind the "you are such a nice guy" stuff. She's probably wants to stop you seeing other girls. Its manipulation just ignore it.
And KEEP GAMING lol ive seen this wayyyy too many times befoire, only for it to turn round that the girl was going behind my back, cheating, getting my "mates" to spy on me,
Other forms of this are:-
"Where have you been all my life"
"I dont know what i would do without you"
"Im so lucky to have you"
"I love you" (like randomly when she knows you are going out lol)