Aw, that is great that he wants to cuddle more! Hopefully you can stop the biting so you can both enjoy each other more
My first suggestion is what you’re already doing, as soon as he bites, stand up and walk away. Don’t come back for at least 5 minutes to pet him. It may seem like it is taking a while to get through to him, but eventually he will recognize the pattern! Secondly, when he bites try yelping loudly. This tells him that he is actually hurting you (it is how a rabbit would respond to a nip that was too hard). Last, if none of these things work you can try giving him “the bunny butt”: when rabbits are mad you might notice he turns his butt on you. You can do this back to a rabbit, stand up and turn away pointedly. Keep turning away if he tries to get in front of you again. When we did this to Thor, the poor dear was so confused, kept trying to make up afterwards.
Overall, just be patient and NEVER use physical punishment on your rabbit, they wont understand and will just start holding a grudge. When we got Thor she was very nippy, but over months of having her, and doing the things I mentioned above, she has almost completely stopped (and when she does nip now it is super soft, so I’m not sure if she might just be grooming me).