Thanks for the advice all, here are my thoughts on the hand to answer some of the questions.

I played AJ as we were down to 5 handed on the table and tried playing it with slightly looser starting hands, being on the button made that decision easier too as I am only really behind to 5 other hands and the odds of those being out there 5 handed are not great.

The reraise was mainly because I put the CO raise as a blind steal, which I think his fold to the reraise indicates was a correct read.

With the check on the flop to me, and the A hitting I figured I was ahead and put out a pot size bet to see where I was as well as to not give him odds for the draw. If I'd been reraised here I was ready to let it go due to his cold call of a re-raise before him pre-flop.

After the check on the river I put him on the fluch draw and didn't want to give him a free card or the odds to draw so bet out 3/4 of the pot. Looking now I think that bet may have been too small on a pure pot odds calculation (and that is what I am mainly trying to figure out) but I don't think now that he would have gone away even if I'd dropped the hammer.

With the check on the river to me I had him pegged to check raise me and decided to just check it out and see if I was right on what he was chasing. Figured I was happy with what was in the pot if I was wrong, and didn't want to lose more if I was right.

In terms of my overall game though and comments here, I think AJ play might be a leak in my game and will be the first thing I check when I get poker tracker reinstalled.

Thanks guys.