“My female friend can’t take the hint that I’m not into women”

My platonic female friend (I am also female) has been flirting with me almost non-stop. We’ve been friends for a very long time, and I’ve made it clear that I’m only interested in men. I admit that I’m disgusted to think of her romantically, but she really can’t take the hints that I’m giving her. This isn’t something I’d like to stop our friendship over, but how would you suggest that I get her to stop?