TT hand

[felson]

Online, .5/1 blinds. Both my opponent and I have about 100.

I have only been at the table for a few hands, so I have no read.

MP opens for 3.50. I call from LMP w/TT. Heads up.

Flop is J62, all diamonds. I have no diamonds. He checks, I bet the pot, he calls.

Turn is A clubs. Check-check.

River is A spades. He bets $5, I fold.

[Oddchild]

Personally, I think it was probably a good fold. Suspect he had AQ or AK with one diamond judging on his play.
A pot bet was not enough to scare off his overcards and FD, but it would be unreasonable of you to want to get more in on the flop.