this hand simply is a cooler.......you play 4c5c preflop like the best thing your hoping for is a flop like what you received. You flopped a straight with an open ended straight flush draw which is GIN because even if somehow you are behind by flopping the low straight you still have 9 outs twice if all of the clubs are still in the deck. The fact that you missed your 9 outs twice in this hand and that you flopped the low straight and your opponent flopped the high straight simply is a cooler. I wouldnt have played the hand any different than you did. The only thing that you could argue to be done differently is just simply fold 45cc preflop and not even bother playing it. However as played by choosing to see a flop with 45cc when you flop that straight with an openended straight flush draw the rest becomes standard and its unfortunate you missed your 9 outs twice. Simply put that hand is a cooler and there is absolutely nothing you could do to get away from the hand once that flop comes. Folding on the flop is the WORST possible move you could ever make there because at 1/2 live nl most players will be 4x reraising your flop bet with alot of two pairs or sets so anyone trying to make the arguement that when your villian raises your 15 dollar bet up to 60 dollars that you should fold knowing you have a made hand already and even if under the slimmest of scenarios you are beat and your flopped straight is no good like i said you still have 9 outs twice. NEVER fold this hand on the flop EVER especially taking into consideration you are playing 1/2 live NL. Tough hand.....cooler....GG