Dog for Rehoming

I got Millie back in 2021. She is such a loving dog. She has such a great sense of humor. She loves to play with toys, and play fetch with balls. She loves kids. Millie loves food, and has been really good at recently transitioning to eating Costco food. She takes a second to warm up to you... she may bark or be apprehensive when she meets someone new. But once she gets to know you, she is such a loving and good dog. She has been an amazing companion to me as I got divorced back in 2021 and she has been my source of comfort a lot of the time (I also work remote so am around her all the time). I am very attached to her, I love Millie so much. It makes me sad that I have to put her up for adoption. The major reason for me having to do this is because I'm moving in with my girlfriend, who already has two other dogs. Handling three dogs at once has been hard on our relationship. I am looking for a very loving and caring family to take Millie in, and want to make sure its the right fit.