For context:

I started fucking a girl I was already friend with about 5 months ago. In this period she showed her worth with sex, gifts, and general low to zero drama. Only one time we had a discussion where she shit tested me and I told her that I didn't wanted people who give me stupid drama in my life, and things continued being great.

So far so good, this girl has became a fuckin whore in bed, to the point of googling and asking to her friends (girls that are friend of mine too) help on how to suck a dick better and how to give me better sex in general. I know this because a good friend of mine was having sex one year ago with the same girl (for a period of about a month or two) and told me that she was reserved as fuck in bed, she didn't even wanted to give him BJs. The same girl begs me to cum in her mouth (As far as I know, I was the first to do that) and a lot of nasty stuff, hell yesterday she was angry because I didn't gave her my cum LOL.

She throws some light shit test here and there like:

"Do you really love me?"

"I'm a men, I have no feelings" and then proceed to give her a kiss in the cheek with a smirk, or answering "Of course I love you babe, I love all my friends". This is usually followed with a "I love you" or an "I like you" when she does something I approve.

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No drama, great sex, and so far I'm keeping frame.

So, I'm here looking for general advice from people with more expertise than me in this, to keep things this way (or make them better) and avoid fucking everything up.

Thanks in advance guys!