Is it weird to “accidentally” log into your old exes FB account

Ok so my friend was telling me how on my old laptop which did have my ex from 5 years ago password saved, I should “accidentally” log in to see if he’s looked me up or if he’s single. My friend claimed she did this once and just said oops I logged into my old computer and didn’t realize it logged into your account. He had no problem with it. Idk, I’m over my ex but he was still my first love and we’re not friends on anything (he had a gf and would watch all my stories then one day I was unadded on snap but he kept me a friend on FB and watched my story. So I unadded him on FB) and I do wonder if he ever thinks about me or is still with his GF even tho she left for the Navy in January and I’m sure she is back due to COVID. I just don’t know how I feel logging into his stuff