Sex is a strong biological need. But you have to know how to control it. You are at mid life and should understand that when you were younger, you could give freedom to your passion and lust, but now your responsibilities have increased and your uncontrolled passion can destroy your Family Life.
Visiting prostitutes when you were 22 is acceptable though not pardonable, but doing it again when you are 44, reflects a lack of will power. The more you fan your desire for Sex, the more it will get hold of you. It would be a wonderful situation, if your libido had increased and you used this to your advantage with your wife, but you feel proud that you are able to please the prostitute. Try pleasing the prostitute without paying her fees and then see whether she is really happy to see you. It is just Business and nothing else.
Instead learn to build the bond with your wife. This will stand you in good stead all your life. Don’t just say that your wife is not interested in sex, ask yourself what effort you are putting in the relationship.
No one can help you, but yourself. Change your view of Life and Sex and you will find your answer.