[ticks]

I'd raise more preflop - 4bb+1bb per limper usually does the trick of getting the hand heads up.
Bet more on the flop as well - with such a weak bet you are practically begging to be outdrawn.
Bet the size of the pot on such a wet flop.

45 hands is not much - those stats basically tells us that villain is not a maniac and is not terribly loose.

I think you are beat here.
The 4 didnt help villain, so I think you are looking at JT or 77 a lot of the time.