Am I overreacting???

So my boyfriends best friend tested positive for Covid on the 22nd of October. Just last week (the friend) was talking about not being able to taste or smell anything. He didn’t necessarily quarantine because he was caught at a restaurant 7 days after receiving his positive test. Today my boyfriend decided to go hang out with him because it’s been 10 days since he received his positive test. We have a three year old and I’m currently 34 weeks pregnant. He thinks I’m overreacting because I think he needs to quarantine away from us since he decided to be careless but he says since I’m fully vaccinated and he got his second dose this morning, it’s not a big deal??? Am I overreacting? I don’t want to sacrifice the health of our toddler just because.