It's six-handed. Always count backwards from the button. First to act in 6max is the lowjack. You would be better off never, ever using the term "UTG." It is position relative to the button that matters.
Have you two finished? Can we get back to the hand? I think OP played it fine. Sure, you could raise pre, but then likely be playing a big pot OOP, with a somewhat speculative hand. Why do you say standard check fold to PSB?