[FM] My (28M) friend (27F) cheated on her boyfriend with me

We got back to our hotel room extremely drunk after partying with a mutual friend that we were visiting in a different city. My [27F] friend’s bf wasnt able to join, but their relationship had been going downhill anyway. My friend was lying on her stomach on the bed and wanted to show me something on her phone, but held it so that the only way I could see it was to basically be next to or on top of her.

Some backstory: Our friendship had been platonic even though she’s often very flirty and suggestive whenever we go on trips – we always share a hotel room and share a bed most of the time. She’d come out of the shower either in a t shirt and underwear, or in just a towel (and ask me to “turn around” while she got dressed), ask me to help her with lotion, fix her hair, and a bunch of other things. I have no interest in her romantically although she is cute and extremely fuckable (I made a move on her once when she was single and we were both drunk and she rejected me lol)