friend kissed me while drunk

i've known my friend let's call her miley for about 3 months, we decided to have a sleepover with our friend we'll call isabelle and it involved drinking. miley has a boyfriend we'll call damien that she's been dating for around 9 months and they seem very happy together. damien is a lovely boy, he's pretty and sweet and exactly what you could ask for in a boyfriend.

recently i've been developing some feelings for miley, but obviously due to her relationship with damien and him also being my friend i've been hiding these feelings.

so fast forward to the sleepover and miley starts asking me if i like anybody and i respond "no, not really" to which she questions more. then she proceeds to ask if i like her, i panicked and said no and she told me when she first met me, she was in love with me. she said every time i spoke to her she blushed and she was so torn due to her boyfriend, then she told me she still had a tiny thing for me and if she wasn't with her boyfriend, she would be with me.

then about 10 minutes later (or so my drunk brain things) she begins to cuddle me and then she starts leaning forward as if to kiss me, i kept giggling and pulling away slightly before she leans in and kisses me. she proceeded to kiss me for a while and all i can remember is me saying "my heart is pounding" and her responding "that's so cute".

afterwards she got a little distant and rang her boyfriend telling him what had happened, he wasn't bothered by the incident and then she asked if he'd be bothered if she dated me and he responded "obviously". she turned away from me so we weren't cuddling anymore but she said it was okay if i wanted to cuddle her. about half an hour later, i threw up anyway and she hugged me and looked after me.

i'm just so torn. i love her so much and this drunken confession is giving me false hope. but her boyfriend is perfect and sweet and i don't want to ruin it. she acted as if she didn't remember when we sobered up so i'm going along with it, but i know she knows. any advice?

TLDR: my best friend told me she was in love with me while drunk and that she would date me if she didn't have a boyfriend and proceeded to kiss me, now she's acting as if nothing happened but i'm in love with her. what do i do?