I think it happens to all of us. Especially after a vacation where you're used to spending so much time together. I know it's hard, but it just takes some getting used to. On Christmas Eve I took my boy dog Tucker to my mom's for a sleepover, while my fiance stayed home with my girl dog Biddy. I was heartbroken all night missing Biddy and thinking that she was missing me. I know it's silly, but I kept thinking that she was going to be extra sad because it was Christmas Eve (like she knows what day it is!). Anyway, I think it's completely natural to feel the way you do - you love him so much!! Good luck - things will get better