Is AUTHOR wrong in the post ? POST : This has happened a couple of times with my friend and each time we have argued about who is in the wrong.

In this particular case me and my friend (F) went out to the bars with some other friends of ours. I'm having a great time, and my friend was too. 

Now my friend recently decided that she doesn't want to drink as much when she goes out, so she only had a couple drinks for the night. Her lack of drunked-ness coupled with her general dislike for "partying" as hard as me and the other people there made her want to tap out around 12:30 am or so.

She turns to me to say "Hey, I think I'm going to go home." I say something along the lines of "Okay, see you later!" I was having a blast and didn't want to leave so early.

She looks at me for a second, then heads out of the bar. I thought we were cool until the next morning and she tells me that I shouldn't have let her walk home alone. It is a long walk from the bar area to our place (maybe 20/30 min) , but she wasn't that drunk and I myself have made it home alone plenty of times before that, so I thought it was fine. I also mentioned that she could have taken an Uber if she was that scared to walk home alone, but she did make the fair point that it's a bummer to pay surge prices.

I just want to know once and for all if it's  an asshole move to let a friend (especially female friend) walk home alone?