This is a prime example of where you are going to take advantage of ' pot odds' to work out whether or not it is worth making the call.
Unfortunately, some cool cat has made a bet, putting you in a tricky situation where you have to decide whether or not it is in your best interest to call to try and make the flush, or fold and save your money. You have two hearts in your hand and there are another two on the flop. You are on the flop with a pretty decent flush draw. Watch SplitSuit's video on Flushes and Flush Draws for 8 hand histories involving strategy on playing flushes in Texas Hold'em. Mathematics: Flushes & Straights : Simple Pot Odds : Implied Odds : Reverse Implied Odds