Overthinking

I saw my boyfriend’s search history on Facebook and there were a few girls’ names there. He didn’t follow them or react to their posts, he just searched them. I know he never follows random girls, but seeing that made me feel uncomfortable and a bit upset. Now I’m overthinking — maybe he was just curious, or maybe he found them attractive and looked them up. I’m not sure if I’m overreacting or if my feelings are valid. Would you consider this microcheating, or is it normal? Should I talk to him about it or just let it go?