why do I always think like this ?

[GahGah604]

I made the right read, so I feel I made the right choice.. he told me he had a high diamond. I think it is 67% I would win, but a coin flip if he paired the board or had some sort of straight draw as well.

I am flush paranoid, what can I say

Why do you think you made the right choice when you folded to a $10 bet in a now $40 pot when you were ahead AND had position? He's only gunna hit that flush 1/3rd of the time. 2/3rds of the time you can milk more out of him with a turn bet.

At the very least just see the turn & see what the SB does...

Instead of just assuming that they've always got the flush, especially on the flop, put them on the wider range that they're likely playing (live = wide range generally). If they've got the flush they'll probably 3-barrel & you can get away on more expensive streets, but the flop is not the place to lay this down to a minraise ...

agreed