what do you think of her? opinions greatly appreciated.?

my girlfriend was also my best friend before we got together. so i wanted some opinions on her cuz well...im hesistant about taking things further.

pros:

-shes sweet and sometimes calls in the morning just to tell me to wake up while she laughs at my grogginess. its cute.

-when she was still a senior in high school, she was always there when i needed her. i told her everything, almost.

-she actually believes in me and keeps me inspired and motivated. something i really appreciate.

-she likes me even though i am nerdy. i mean...i am a swimmer so i have the swimmer build but i guess im a closet nerd.

-she is real around me. like...i see who she really is.

-she trusts me and i can kinda sense she really likes me. so can everyone else that knows her.

cons:

-she slept with her new best friend in college while her roommates were away. she told me not to be jealous and that they didnt do anything together. but just the fact makes me kinda upset. i mean there were two other beds...

-she is a partying kinda girl. not that i mind. its just she gave her phone number to one guy when she was drunk at a party.

-she expects me to remain perfectly faithful. and dont get me wrong, i try. i'll flirt but im always loyal

-if i ever mention that i was flirting or being flirted with, even when i am joking, she gets mad and doesnt talk to me.

-she has been sexually active before with more than 2 guys and she had a Fbuddy for a long time. not anymore cuz we are together now. but she has a sex drive and i would hate it if she cheated on me, though i really hope she wouldnt.

i really like this girl. what do you guys think? she is my best friend after all.

anything helps. thanks.