Don't know how to feel

I need other girls guidance on this. I picked up my boyfriend from work and we ended up going out with another few coworkers (my bf is also my coworker) and I wasn't expecting to go out so I wore a really short dress that was on my floor next to my bed. And my boyfriend got mad at me because apparently when I was nervously fidgeting with my dress I was "hiking up my dress" and his friend was looking at my legs. Like excuse me. I'm sorry that have legs and I am wearing a dress.  If your friend is looking at my legs, maybe get mad at your friend instead of me. Am I being crazy? I am fucking pissed. Like excuse me for having legs. I was born with them. Were you born an asshole?