Flopped a set on a board with 3 diamonds

PokerStars No-Limit Hold'em, $0.05 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Button ($5.93)
Hero (SB) ($6.11)
BB ($10.12)
UTG ($1.93)
UTG+1 ($9.87)
MP1 ($2.95)
MP2 ($19.28)
MP3 ($12.24)
CO ($5.10)

Preflop: Hero is SB with http://www.flopturnriver.com/phpBB2/.../smiles/6h.gif, http://www.flopturnriver.com/phpBB2/.../smiles/6s.gif
UTG calls $0.05, 3 folds, MP3 calls $0.05, CO bets $0.25, Button calls $0.25, Hero calls $0.23, 2 folds, MP3 calls $0.20

Flop: ($1.10) http://www.flopturnriver.com/phpBB2/.../smiles/5d.gif, http://www.flopturnriver.com/phpBB2/.../smiles/7d.gif, http://www.flopturnriver.com/phpBB2/.../smiles/6d.gif (4 players)
Hero bets $1, 1 fold, CO raises to $4.85 (All-In), Button calls $4.85, Hero?

Reads; I'm thinking CO has AK diamonds, or AA or KK or QQ with the diamond. I not sure on the btn, he doesn't shove over the rest of his chips which I think any hand that should be calling should be pushing over.

I'll be honest, I don't want to call, but I think that is me being results oriented, I think with the btn's money in there it is a shove over, which is what I did. I hope I made the right choice, even though I lost the hand.

if one has a set we're not getting a good enough price.

with that said, its waaaay more likely this is like an overpair and a draw or something so i stick it in and take my 32% equity.

do you have any reads on either player?

poker-stove it.
see what odds you need vs two flushes, vs a big draw and AdAx, etc.
stove your hand against their actual hands as well, you may find that getting it in was good even with results being meh.

Look at the odds you have.
etc.

I think that you should fold this time.I think that you got better hand then CO at the moment but there is one more call.PS is profitable to play connectors.I lost lot of hands on PS when I was raising preflop with pocket pair or AK... and get call from opponent who plays some connectors suited or off.