Common problem with TPTK

Game is $100 Max with .50 / $1.00 blinds.

Villian is a very solid player, switches gears at random intervals and has been on an unusually tight stint for about two days.

Hero is UTG with A [img]/images/graemlins/club.gif[/img]J [img]/images/graemlins/heart.gif[/img]

Stacks are as follows:

BB ($87.50)
Hero UTG ($119.75)
UTG+1 ($56.00)
MP1 ($92.50)
Villian ($176.00)

Hero limps UTG, UTG+1 calls, MP1 calls, Villian calls, SB folds, BB checks.

Flop ($5.50)

2 [img]/images/graemlins/heart.gif[/img]J [img]/images/graemlins/spade.gif[/img]8 [img]/images/graemlins/heart.gif[/img]

BB checks, Hero bets $5.00, UTG+1 folds, MP1 folds, Villian makes it $10 to go, BB folds, action back on Hero. . .

Hero raises, $25.00 to go.

Villian calls.

Turn ($55.50) 5 [img]/images/graemlins/heart.gif[/img]

Hero checks. Villian checks behind.

River brings the 5[img]/images/graemlins/spade.gif[/img].

Hero checks.

Villian bets $25.00

Hero?

I played this hand very timidly on the turn and river, but the board was very draw rich. How should I proceed with a large pot and such a scary board against a very solid player? I had made it obvious at the end that any bet would take the pot down.

Advice on all streets is very welcome. Thanks.