Overreacting or?

Im in a relationship but he lives an hour away. We see eachother five times out of the week.  Those other times hes either working or at a hookahbar. Anywho last week he took me with him where this girl was acting strange around me. Then the next night he got drunk and said " shes cute and found out he slapped her ass"  of course i got a lil mad so I became silence. But then he says im overreacting. Am I?