Am I right or wrong? Relationship manners...

Vanessa
I don't know if I'm over exaggerating but we went to in and out and I ordered animal fries and he ordered a burger with a chocolate shake. I'm the one driving and he's over there slurping his shake away until I heard it's almost empty pretty much he rolls down his window and throws it out. I go thanks for offering and he says what I was craving one. Whenever I buy something to eat/drink i ALWAYS offer him and so maybe that's why I felt that way because I expected it. It pissed me off. Then when we arrive home I'm getting my stuff together and I'm thinking he's outside waiting as a gentlemen should be to make sure his girl is safe but nope he's already walking into the house. We've been dating for three years. Am I being dramatic?