Is My [26F] Boyfriend's Best Friend's Girlfriend [25F] Trying to Compete With Me?

It’s a bit of a long story, but essentially, there's this girl who is dating my boyfriend's close friend. She's really nice, but over the last three years, I've started to notice that she’s been mimicking so much of what makes me... me. I understand that imitation can be flattering, and honestly, I can relate—I've definitely taken inspiration from others and bought things I see recommended on social media. However, her copying has escalated to the point where she mimics everything—my laugh, every date spot my boyfriend and I visit, my outfits, my shoes, and now she’s even trying to land a job at my workplace. Since we're part of the same friend group, we occasionally play board games together. However, every time we play, she gets incredibly competitive with me, specifically targeting me to knock out from the game and accusing me of cheating whenever I win. I used to enjoy board games, but it’s no longer fun for me. There was also an incident in December during a white elephant gift exchange with our group. I picked a gift that didn’t seem popular, and I was quite happy with it. When it was her boyfriend's turn to choose, he asked her what she wanted, and she said she wanted the gift I had selected. According to our rules, if she wanted to steal it, we would have to compete in a “shot off.” Normally, I wouldn’t get involved in competitions, but this was the last straw for me, and I decided to participate. By the end of the night, I felt so frustrated—like, why did I even bother? I talked to my boyfriend about it, but at first, he was skeptical. So, I decided to test my theory—I bought something and posted it on my story, telling him that I expected her to buy the same item. Sure enough, a week later, she shared the exact item on her story. Keep in mind, this item could only be ordered online from an international website. My boyfriend was shocked, but he’s unsure how I should address this without directly confronting her. I’m feeling uncertain about how to handle this situation because it feels wrong to be upset. I guess I'm posting this to ask—am I overreacting or overthinking things?