This sounds exactly like Dill.He will climb all over you,chase you for food but if you try & stroke him he tenses up & runs.I used to think he was unhappy with us but I realise its just him.He was a rescue bun so it makes you wonder why he is like he is.If he was unhappy he would be tense the whole time you are in the room but Dill lays full stretch,eyes tight shut.That doesn't sound like an unhappy bun to me & neither does what you say about your bun.Im sure your bun loves you in his own way.Have you got another bunny?I often wonder if Dill would be more attatched to us if he hadn't bonded with B or whether he would've been exactly the same.If B goes before Dill I think I would keep him on his own for a few weeks to try & get that bond though im hoping B will live a long while yet so hopefully we will have bonded more by then.
With Dill,we have adjusted our way of thinking.We dont expect kisses & cuddles from him but watching him play is enough for us now.He is so cheeky & makes us laugh without the contact.Over time your bun may trust you more but if not enjoy him at arms length & see how much he will make you smile.