is it bad to stalk a person u love but u barely know¿ (bad english)

So I had been into something with this girl for quiet the time, and seh had a girlfriend by the time we first met, but she cheated on her with me and then broke up with her. We haven't yk like date seriously for now, an that's driving me insane, so I have this whole folder about her, like her family, herself, her daily schedule, her daily routes and so-

is that weird? need opinions lol