bill already told steffy he won't blackmail her to be with him when she asked if that was the price to get ridge out of jail. bill almost seemed hurt by her suggestion. bill needs steffy to want to be with him. bill is convinced that steffy still loves him and that if given the chance he can bring that love back to the surface. as for brooke, i didn't see bill chasing brooke too much, i saw brooke always reminding bill of what they shared and the balloon ride.
Well he has every reason to think so. Steffy seems to be able to deny having feelings for him to everyone but him. He once again told her he knew she still has feelings for him and she didn't deny it, didn't say, no I don't have this kind of feelings for you. On the contrary she seems to know he was right but afraid to admit it.