Is this a good example of the fact that I really don't know what I'm doing?

PokerStars 0.10/0.20 Hold'em (8 handed) from (Format: FlopTurnRiver Cards)

Preflop: Hero is UTG+1 with , . MP2 posts a blind of $0.10.
UTG calls, Hero raises, 4 folds, SB calls, 1 fold, UTG calls.

Flop: (8 SB) , , (3 players)
SB bets, UTG folds, Hero raises, SB 3-bets, Hero calls.

SB has been a maniac...capping flops on pure bluffs. I had the read and I still slowed down (this board is scary).

Turn: (7 BB) (2 players)
SB bets, Hero calls.

I can't fold to this guy because of the crap i've seen him play...should I be raising?

River: (9 BB) (2 players)
SB bets, Hero calls.

Again, I can't fold...I've seen him play too many junk hands this exact same way...

Final Pot: 11 BB

Normally I don't include the results unless it helps reinforce the read I had on the guy and may help with suggestions on way to improve my play.

Results in white below:
SB has 9h 3d (one pair, eights).
Hero has Qh Ac (two pair, aces and eights).
Outcome: Hero wins 11 BB.

You played it fine!

I would cap the flop though just to see if he still leads turn. (not sure what that would tell u though since he is a maniac). If there wasnt a possible flush i would raise turn too. But its a matter of taste. U could possibly raise turn anyways because he would have raised pre flop with AA, KK or AK and possibly A8 too since he is a maniac. If he would have check/raised the flop i would have gotten a little bit more afraid than if he leads. Just a touch though.

Sure he is a maniac but theres nothing wrong with just calling down. Maniacs loves it when they actually have something and u cap it all the way to the bank. Theres nothing wrong in turning passive against a really aggressive opponent. (as i see it)