When we first got our bun, she didn’t mind being held, but as time went on, she liked it less and less, and now if we even attempt to lift her off the ground, she scampers away. However, we spend a lot of time sitting on the floor, hand feeding her veggies, and just playing. She loves attention, and to be petted and snuggled .. as long as her feet remain planted on the ground. Spend time with him in his new environment. You both have to get used to the new normal, but it doesn’t mean he can’t be an enjoyable pet. He is probably feeling a bit insecure right now.
Our bun is very happy and affectionate, but she definitely likes her routine and familiar spaces. Also, when anyone walks into a room she is in, it helps if we don’t walk in quietly … that scares her. We always enter the room talking so she knows it’s us. It may help if you do that, so he knows he is in a safe place. I really think he’ll adjust, but you just have to get used to the fact that he no longer wants to be picked up.