Very into stepdaughter

I’ve been thinking over the last year more and more about her. I’ve been sniffing her dirty panties when I can, even tasting them sometimes. She turns me on so much and i can’t stop looking at her in a sexual way. She has not given me any indication she is interested in the way I want her to be but damn it’s so hot to think about her! Where do I go from here? We have a good relationship it’s just that my thoughts keep on going past that.