[bozlax]

Preflop is good, as is the flop cbet; Bona, you're over-thinking things.

Once he raises, you're getting almost 10:1 to call; if he's holding a 4 you're effed, but he could also be holding 77-TT, 2x, 53s, A3, A5, all manner of crap that's more likely than a 4. Note that if he's holding A2, you've got 5 outs, not 3.

Same situation exists on the turn, except that there's now a bunch more hands (Tx, with the exception of QT) that you're happy to draw against. Getting just over 6:1 it's thin, but the possibility of draws pushes it to a call.

Once he fires the final barrel on the river, you're not good 1 in 8, let it go. If the K and T on the board were, say, 7 and 9, I'd probably call.