Girls, Why does she stalk my Instagram but not open my message?

So there’s a girl at university I think it’s really pretty. But she has a boyfriend. I noticed if I either like her posts , or if I react to her story she doesn’t open the message but always stalks my Instagram.

I think it is because she has a boyfriend. But have my own business which is rare for a student and I made enough money to buy a new Mercedes. ever since I uploaded pictures of it and me. She always stalking my profile , but never talks.
I know she has a boyfriend but why if I compliment her or react to her photo does she always stalk my profile. She doesn’t do it to my friends if they do it. Only me
Girls, Why does she stalk my Instagram but not open my message?
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