if he's 12/10 then his UTG opens must be super tight, as far as J's go, he has

,

,

(does he even open KJ and QJs 100%?) I guess he has

as well, and prolly 66 - he also has the 8 AA's, the 8 KK's, the 8 QQ's (your call looks like a smaller pair + the SB range is huge + weak. So really we're thinking about 4 combo's of JX, 2 combo's of 66 (and I don't think he opens all the JX's all the time) so given the action, how your range is perceived, how under-repped your hand is and the basic combinatoric's of the UTG range folding seems a big mistake.
I think calling and c/c the turn/ bet river if he checks is the way to go here.