Moving in with moms boyfriend? Am I overreacting?

Well first of all you have a right to feel the way you do, this is a huge change for you. But you should try to be happy for your mother. This guy isn't replacing your dad, i know that you feel like he is, but he really isn't. It seems like he really cares about your mom and wants the best for her. I do think she's moving to fast with this guy, it doesn't even seem like they have actually met face to face and she's moving in with him?? That's crazy. But maybe she feels like she doesn't have any other choice. Idk, the best thing you can do right now, is be supportive. Being a single mother is a hard job and she's right she deserves to be happy. You can still be protective over her, you should be. But if this guy makes her happy, let it be. You can't do anything to change whats gonna happen so accept it and make the best of it. You never know moving to VA could be the best thing that has happened to you..