Am I being jealous for no reason?

Me and my significant other live with his friend and his girlfriend. Well his girlfriend around in a towel in front of my boyfriend, and bends down to grab shit legit right in front of him!! It makes me so pissed off I want to claw her eyes out!! Like why would you do that right in front of your mans best friend? But god forbid if i done that in front of her man. 😡🤬👊🏻