What makes me a selfish person?

So today, wait, let me tell you how this starts. I was at a warehouse sale( kids clothes) a few weeks back, I met a girl there and she asked if I was looking for anything in particular and I said yes, but if I find it, I find it. I never pushed for it or anything. Mind you, these children’s clothes have a pretty good resell value. well anyway, after waiting hrs in line...we finally go in and I completely forgot all about her since you’re in a rush to get what you want.. we’ll I was about to pay and she pulls me aside and she says look what I have, I’ll exchange it for something you have ( she must’ve seen something in my stack since I had over 20 outfits) and she picked the one she wanted and that was the end of it, so I thought!! Well today, I posted that outfit for sell since my little one got to wear it already, why not sell it? Well all of a sudden I posted the outfit on a fb bst page and I got attacked by all these animals, calling me selfish/ ugly soul/ I took advantage of this person/ karma is going to get me??? Am I missing something? Was I suppose to look for her after I wanted to sell it? Was I not suppose to sell it?

/r/AskReddit Thread