Fiancé using my pregnancy as a reason to go out and party

Tia
Both my fiancé and I recently just found out we are expecting. Prior to me being pregnant, the two of us used to drink and throw parties at home. Since finding out about the baby he has increased the nightlife activity and drinking with his boys while I'm at home late at night alone. And it's starting to become very annoying. Can anyone relate to this situation, or has been in the same position as me?