It sucks that the guy had a 4....but i just want to point this out.....Your in the CO (2nd from the dealer button) (Great table possition) with an unraised pot with one guy who limped from middle possition. If you raise with your 55 you might get the SB and BB to fold. A 3x raise is good 4 max. Then you dont have to worry about that straight as much. You want to narrow down the field. That flop is not only a flush draw but a straight draw and you flat called a 3x bet??? 3 bet his 3x bet next time... make him pay for the draw!!! If you just smooth call here your giving him better odds on hitting his flush or straight, by raising your giving him really bad odds to call. Gotta be aggresive not passive. I think if you raised 3x preflop the sb and bb wouldnt of been in there and you woulda took this pot home. theres my 10c