I have two rabbits, a female and male. My female rabbit voraciously licks my boyfriend and I get so jealous! Licking/grooming is obviously a sign of a strong bond, but it can also be a sign of submission. A rabbit who bows her head to be groomed is, in their mind, the dominant rabbit. It could be that as your rabbit has grown older, the rabbit is realizing its dominance, and knows your love for her so she chooses to be groomed rather than groom. However, all of the signs you mentioned are delightful, adoring gestures. They signify trust, excitement, love, and contentment. You have a happy rabbit, and a spoiled one! I try not to get my feelings hurt when my rabbit licks my boyfriend and not me. She expects me to pet her for long periods of time and doesn’t attempt to groom me, but will groom her bunny husband and my boyfriend without giving them time to groom her. I take that as a sign that she knows where her affection comes from. That may be a superstitious guess, but that’s what I like to believe. Either way, you have a happy rabbit 