Edit: The Hand history is somewhat screwy because it's a HU pot. I'm SB/BTN, Villain is in BB.

I mostly play 6-max; this table was about to break up but I decided to play one last hand HU. Villain is a TAG reg. I have a slightly LAG image, but not crazy.

Preflop seems standard. I don't know HU ranges very well, but I'm opening BTN with maybe 60% hands, and this hand comfortably fits into raise/call 3-bet range.

Don't think there's anything else here to do except call.

Opponent keeps barreling. He could have A5s, AA, KK, QQ, JJ or AJ for value bets. He might even be value betting TT-99, but perhaps not. I don't think he should have 22, 33, 44 in his preflop 3-bet range. For bluffs, he could have AK, AQ, KQ. Or some hearts FD or something like 55? I think I still need to call?

River is a brick and he jams. I really don't know what to do here.

In my experience, 3-bet pre, bet/bet/jam by a TAG reg is very value-heavy. So I decide to fold. I can have some boats, A5s, 65s, and AJ here, (maybe A3s as well?), which can call.