Should I take offence to being called a b*tch by my love interest?

So this is the situation I met a guy Friday of last week we clicked brilliantly! He’s lAmerican and I’ve lived in the country for roughly 5 years on and off! We’ve been talking all weekend and I had posted something on Snapchat story about not understanding American football. And his response was “b*tch you’ve been here for 5 years you can learn 😂”. I know to some degree this is a joke...but this isn’t a way in which anyone has spoken to me. I call myself the b word when I’m alone and critical of others. Like “oh I’m such a B”. My friends have never called me that or to my face and if they did I wouldn’t take offence to it! Why am I hurt by this? I haven’t responded he’s sent a Snapchat that I haven’t opened since last night! I thought if I slept it off I might wake thinking I was overreacting. But my feelings are still hurt. Why is that and should I tell him so? Or would he think “what and easily offended guy”