What's going on?

Okay guys my boyfriend gave me the password to his Snapchat and Instagram. Today I decided to log in to his Snapchat, out of boredom and curiosity. After scrolling through it for a few minutes I went through one conversation from a girl that he's known for a while (2015 to be exact) but she recently posted a selfie on her story and he commented 🔥😍🔥. Idk what to do. Do you guys think it's bad that he commented that?