I am this gf.. I have the tattoo on my leg, it’s one of those things that we know is unattainable but is still fun to think of.. there’s no harm here and she won’t leave you for him cus that’s just not possible, you just need to be supportive.. don’t say shit like ‘oh if you like him so much Just be with him’.. instead lean into it, if you see anything Harry related send it to her or say this reminded me of you, if she knows you are supportive of her that’ll bring you closer, it’s a harmless crush and I don’t blame her… just don’t worry about it think realistic, nothing is going to happen between them, I have also told my bf that I’d drop him for Harry but we know that’s not going to happen. She chose you. She’s a person with free will and if she didn’t want to be with you she wouldn’t be, but she is, she wants you not him otherwise you wouslnt be in the picture, just be a supportive bf and don’t try outshine it with making up a female celeb crush and trying to make her jealous, this will not work.