So I've been dating my girlfriend for a year and a half now. Everything before this has been perfect. She's been the first person I've been with to open my eyes, and motivate me to be better. It's something I've always wanted in a relationship, but never got. I know that we feel the exact same way for each other, but I just found out she has a "crush" at her work. They been flirting, and talking a bit. They'll talk at work, and after work until they go to bed. She tells me not to worry, but my mind just tells me otherwise. I think my mind is just fucking with me. She's been switching her answer as well to that she has feelings for him, to that she doesn't, and back. It's confusing. I still let them talk and hang out. I'm not the type to control someone like that. I guess I'm just seeing if I'm overreacting, if this is natural, or if I should act on something. If you need more information, just let me know. Thanks!