I limp KK utg, a seemingly solid player in MP raises to 5x the BB, I decide to call. I'm not sure if I'm trapping or just nervous. He seems pretty tight, as most of the table has been. I'm guessing he only raises from this position with AK AA KK QQ JJ and maybe AQ or TT.

Flop is Qxx. I check, he checks behind.
Turn is a blank. I bet 4 into the 5 pot, he minimum raises.

Is it too weak-tight to let this one go?

Other options?

i dont fold there. I call then lead the river for $12 into the $21 pot and fold to a raise. Or check-call the river.

You're probably playing poorly if you lose a relative small pot in KK vs AA situation most of the time. It happens, but the majority of the time you have KK they're not gonna have AA.