bump the temps up to 43ish,..
if hes not eating @ all get some bearded dragon pellets, soak them in hot water till theyre mushy and drip drops on beardies nose with a plastic feeding syringe.
use a fingernail to gently press between his lips so he tastes it and he'll start lapping it up. add a pinch of calcium ofcourse,...
i've never had any dragons refuse that, tehy all seem to love it.
at least that way hes getting some food and staying well hydrated till he starts eating the crickets.
has he had a fecal? ..heavy parasite loads can affect their appetite, and stress (ie from moving) can increase parasite loads..
no he wouldnt be happier with a friend, only females can really live reasonably happily together, my 4 females are ok together, (obviously theres still a heirachy and some like to try and move up in the food chain occasionally) but my boy lives in a seperate room cos hes a monster.

(dont get me wrong, i love him, but the girls dont,..)
if his reflections bothering him cover teh reflective side with paper,...