My ex (we'll call her Sarah) of over a year broke up with me about a month ago. She had her reasons, and I understood why it happened but it was still kind of out of the blue and it left me really hurt and insecure, and I made that clear to her. Recently, we've been talking again, and she mentioned she was driving up to my city (about 2 hours away from where she lives) for a hockey game. She wasn't going with anyone so I told her I would join her for old times sake, with the implication being that we were going as friends. I still have feelings for her and was going to try and use last night to rekindle something between us, but I've also been talking to other people since we broke up. So Sarah and I are at the game, and it's going fine, and I decide to take a picture of the view and send it to a female coworker who I have become friendly with since our breakup. This is someone who Sarah is aware of and was jealous/insecure about while we were dating. I never really talked with this person outside of work while Sarah and I were dating, out of respect for Sarah, and I only got her number after we had broken up. But Sarah sees that I'm sending her a picture and she flips out and wouldn't talk to me and ended up leaving early. We've been texting since and she told me that was a dickheaded move by me to text this person in front of her. AITA?