| (25F) keep fixating on a guy (26M) I don't know from Instagram, how do I stop?

This is a bit embarrassing but I'd rather be honest and get some straightforward advice. I came across a guy on Instagram who lives in the same city as me. I don't know him at all and his account is private. He showed up in my suggestions | clicked out of curiosity and that was it at first. But over the past few days I've caught myself going back to his profile, checking it repeatedly, looking at suggested accounts from his page and overthinking things based on basically no real information. Part of me keeps thinking that if I just send a follow request, I'll either lose interest or finally "get over it," but another part of me thinks that might just make it worse. So I guess my question is: How do you actually stop this kind of fixation on someone you don't even know? Do I just ignore it and cut off access completely or is it better to face it and move on that way? Any blunt or honest advice is welcome.