AITA?

My boyfriend went out and saw his friend tonight, and shared a smoking piece with him. My boyfriend works with said friend but the restaurant is currently closed due to the fact that 2 other staff members tested Covid Positive. Said friend we shall call Bob hasn't been in contact with those 2 staff members in a week and had a negative Covid test. I am frustrated and appalled that my boyfriend could be so dumb as to share bodily fluids with Bob during a pandemic. He doesn't seem to understand why I am angry. Am I the asshole?