My heart hurts honeslty.

So we got my baby 5 months ago. We were told she was going to be a medium sized dog. We she is turning out the be a pretty big medium dog and is no longer allowed at my apartment. Now I have to sell her 😢 I am so upset because I got her after my grandma passed. The add is up but I do not feel like I can be there when my boyfriend hands her to the new family. It hurts just thinking of it. 😭