My boyfriend let his friends touch me?

Ok so here's what happend: I had just came back from a road trip with my boyfriend and his family and when we came back I ended up falling asleep on his coach. Half awake I felt someone literally massaging my ass and I assumed it was my boyfriend so I really didn't care, until I heard his friend say lucas your girlfriends got a great ass!! And I looked up and my boyfriend was just sitting there laughing. He didn't do anything about it. What the hell. I didn't scream at him but I was just like what kind of boyfriend let's there friend touch their girlfriend like that? Without saying anything! Has he no respect? Am I just over reacting here?
My boyfriend let his friends touch me?
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