I had drunk sex and need advice

I've (22m) been kind of in love with my friend (25f) ever since I met her 2 years ago and on and off I've thought she had feelings for me too but shit is complicated (she and my brother dated for almost a year and a half lol). We hang out as friends a lot though and keep getting closer and closer. She asked me to pick her up from the airport a few days ago and when we got back to her house we were drinking and listening to music and ended up having sex.

The next morning we talked about it and she said something about not remembering much of what happened and on my drive back home I was thinking about it and it made me uncomfortable. If she wasn't sober enough to remember what happened how could she have been sober enough to give consent. I was drunk too but not too drunk to remember most of the night. She's the one who initiated but I was like being embarrassingly simpy and telling her how perfect she is and that I'm in love with her. Did I accidentally take advantage of her?