Following a girl on Instagram with no Mutual Friends?

I want to follow someone on IG that I knew from high school but I don't have mutual friends/followers with them in IG. So it would look like I searched them up, which I did. So should I follow her? She used to flirt with me a lot back then but I'm not trying to come off like a creep, I feel though like she'll still be down though..

Right now my profile is private because I watched a video and they can see the viewers
Following a girl on Instagram with no Mutual Friends?
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