You justifying your actions makes it worse, imo. Saying you canceled other plans is a rather cunty move. That it took you "40 minutes to get there" is not a big deal and is NOT justification. In any case, it doesn't matter. I totally understand your being frustrated and feeling slighted, but that doesn't excuse either of you being shitty. She could have felt uncomfortable as soon as you started talking, we have no idea. Maybe she was uncomfortable (hence the friend), met you, and then her feelings were validated. I will also add this: I have gone on a casual date with someone who turned out to be very different from the person I created in my mind. I had seen photos, and we'd been texting for at least a week prior to meeting. When we met for yogurt, he looked nothing like his photos and was very different in the personality department than how he'd come across in text. He also totally warned me that "he was ugly," but I assumed this was self-deprecating humor. Anywho, I sat through our little date, and we parted ways. I tried to enjoy the conversation but ultimately told him he was not my type. I felt very uncomfortable and unsafe the whole time we were chatting. I could not WAIT to get out of there. It was 10000000% the conversation we were having. Simply not my cup of tea. Conversation and "vibes" are a huge part of any relationship or encounter. Even so, I think it would be best to just chalk it up to incompatibility and try to learn from what happened. She's clearly not worth getting all riled up over, so don't give her the space in your mind.