we have all the blockers and some FD blockers too, are you contemplating folding?

No was considering calling and see the river.

Both check/calling and check/raising are probably fine on this draw heavy board. Good thing with shoving is that you can get your whole stack in right away, bad thing is that he could have same hand with a redraw and you dont want to get your money in against a freeroll. So probably just check/calling is better option.

opponent is very unlikely to have a straight and is never folding, so he can have set + FD, FD + wrap, double FD, but the key part is i'd hate myself to get bluffed on the river, so just rip it in here.

Utg seems to be a fish (tight passive, probably). A characteristic from that type of player is overvalue some hands. Another good point is about your size. Do you agree with me that you have your entire range OTT (because flop was check/x/x)? And your size was not strong enough IMO, so he will raise with more hands than J9.
And look if you just call, ok?
52 cards - 4 (flop and turn) - 4 (your hand) = 44
16 flushs (8 hearts and 8 spades)
A(2)
K(2)
Q(2)
J(2)
t(2)
8(2)
3(2)

= 30.
So in 30 cards out of 44 (61,2% of the time) you will be lost. SO PLZ, In this spot, 3bet shove easy easy easy.