[emmapeel9]

I havent seen the other replies yet but I will give mine.

I am wondering what he could be check-raising this flop with. He could have a Queen, middle pair or trips.

There is no danger for trips here so a call would be fine instead of a raise. So he doesn't neccesarily have trips here.

If he has middle pair or a queen then he's made a very brave play against the preflop raiser.

I think the all-in move on turn is ok, as he is not acting like he has trips. A smaller raise might be better though as you want a lower pair to be more enticed into calling you. You also will have a chance to fold if you are raised all-in. (although I wouldn't.)

The only hand he could have that makes any sense is AQ. This is strong enough for the check-raise, and maybe the all-in too (if he was a loose player.)

I notice that the only hand you are losing to here is 45.
You'd be very unlucky if he had that. 45s?

I think your play was fine here.

Emmapeel