bf stalking ex on facebook??

so the other day i used my bfs phone to look someone up on facebook because my phone was dead and i saw in his search history that his ex was in there. the 3rd search down. i asked him about it and he said that he doesn’t really look people up much and he accidentally clicks on her name sometimes. but we’ve been together for over 10 months?? so something doesn’t add up here. he always agrees with my stance on cheating and ex’s butt this shit just don’t add up. maybe i’m being crazy. idk. lmk what y’all think