First off, don’t rule him out if you don’t see any grooming! Mine didn’t groom for at least the first week or two of sessions, but they were still a relatively easy bond.
I don’t think she will like you less, but she may be less interested in spending time with you, at least at first. My pair ignored me a lot more for the first month or two after they were fully bonded. Instead of hanging out with me, they just followed each other around. Eventually that phase passed and now Otto acts exactly the same as before. He actually interacts with me more since Hannah taught him how to jump on the couch so he’ll jump up and beg for treats. He did decide he hated pets after being bonded, but he had only started liking them a month before we got Hannah, so I don’t know for sure they’re related. He still hangs out in the living room and watches tv with us, but now he has a buddy to snuggle with.
Hannah was a single bun with a single owner for three years before I got her, so she’s used to focusing on people and getting attention. She didn’t bond with me super strongly at first because she had Otto and was only interested in him, but after her infatuation with him wore off she because very people-focused again.