Flopped middle pair?

[Amy]

Hi guys, long time lurker here, thought I'd finally post a hand today.

I was playing some live $4/$8 last night when I ran into this situation.

I didn't really have any reads on anyone except the guy who was on the button, he was pretty aggressive, betting and raising a lot.

I had 7-8 of spades in the big blind. Four players limped in, and the button raised. I called, and the limpers called as well.

The flop is 10[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/diamond.gif[/img]. I checked, and it was checked around to the button (preflop raiser) who bet. I raised, one of the limpers called, and the button called as well. Turn was the 2[img]/images/graemlins/spade.gif[/img]. I bet, and everyone called. The river was a K[img]/images/graemlins/diamond.gif[/img]. What do I do here? Do I check and fold?

Also, were the other streets played ok? Was the check-raise on the flop a little too much? I figured there was a good chance the button was just betting unimproved overcards and my hand could be best.