dogs and a break up

My fiancé recently broke up with me and we were together a very long time. We had three dogs together. My fiancé left me so he moved out of our home and the dogs stayed here with me. I can tell they can tell I've been upset and have been extra clingy especially when I cry. The one dog in particular was a totally "daddy's girl" dog and I can tell she's acting soo different...obviously they can tell I'm upset, but do you guys think they can tell why? Like do you think they understand he hasn't come home and isn't going to? Do you think they'll forget about him after awhile? I'm upset myself but I also feel so bad for the dogs. They are like my children and they were like his too. 😞😞😞