Here's a story for you of something that happened to me and I want to know from others what they think and what they would have done in my situation.
Essentially a girl joined my company at work. We started to get to know each other through company gatherings and I started to have a crush on her. We started to flirt and roast each other daily to the point it became very natural and in front of others. Only at work though, nothing outside of work. She wasn't flirting with anyone else. During a company outing, a friend asked her if she was seeing anyone or dating anyone or is there any person she usually hangs out with beyond her girlfriends. She said no. She was even asked her sexual orientation and she said she was straight. I tried to casually ask her out but her response to me usually was that she wasn't free that weekend. This happened a couple of times and I assumed that she was just not interested in me because there's no way that someone can always be that busy. Things continued and we still flirted/roasted. Other people in the office were even suspecting what's going on between us and started to ask questions. Then later, she asked me if I wanted to go to a concert and what kind of music I like. She invited me to a concert but she also invited another girl and a friend of hers. We bought the tickets and the event was set. I didn't mind that her friends were coming because it's still an opportunity to hang and also listen to good music. Later, I asked her out for lunch - just the two of us because I thought - why not. She said yes to that and we planned ahead. We went out for lunch to a good restaurant and it wasn't bad at all. The conversation was good. I asked her if she was doing anything later and wanted to hang out - same answer, she was busy.
Finally the concert came. We walked together to the place and she was always on her phone. We met up with the other girl and then go to the concert where we got our seats. Things were alright. Now, comes the surprise. The "friend" that she wanted to bring was actually her boyfriend. Neither me or the girl who was friends with her knew that she had a boyfriend. She doesn't have any pictures of this boyfriend on her social media and she doesn't even follow her own boyfriend's instagram account. It was a bit surprising but it was quite obvious because they got very touchy-feely during the concert. It became super awkward because now it was just me and this other girl. It became kind of a date for us and we got to know each other pretty well.
However, I was still a bit disappointed and shocked. I'm not going to lie that it felt like a knife just stabbed my heart. I still enjoyed the concert but the next day, we are back to work and I have to see this girl again. Obviously, my entire tune has changed now. I understood that I just misread all the signals and was strung along. I felt like an idiot and foolish. I acted normal during work but obviously I don't feel like flirting/roasting anymore. Yet this person is still doing so? I don't really get what her deal is. It seems she just wanted attention. In any case, I'll ignore her for the rest of my life but I just wanted to know if something like this has ever happened to anyone else and why would someone do this? I realize if it was unintentional and she was just being friendly, but why keep a boyfriend secret? When she was asked if she had a boyfriend, why say no? All the times I asked her out, she could have simply stated she had plans with her boyfriend and that would have given me enough information to stop trying. She could have also stated that she was bringing her boyfriend to the concert, but she used the word, "friend".