The first thing you should ask yourself is why you don't have a girlfriend?
If you are saving up (bankrupt and trying to dig yourself out of poverty), I will advise you to continue using prostitutes because sex is a human need and girlfriends cost a lot more in time and money. Reduce it to once a month or less. Just condomize whenever you do it and take extra care. You can't fight nature, and at the same time, there are periods in a man's life when maintaining a girlfriend is not smart/practical.
If you don't use whores due to brokeness, locate your balls and get a girlfriend. In a country of 20+ million women, you can't miss one even with the worst luck. It is a numbers game.
People demonize prostitutes for no good reason. I think they fill an important gap in the sexual marketplace. If I was a Kibera slum dweller, I would rather buy pu**y cheaply once a month than spend the meagre earnings on a wife/girlfriend. For a certain economic bracket of men, a prostitute is a smart economic decision.
If you are bankrupt and you are saving up to start a business and get out of poverty, do whatever you have to do to reach that goal. If you have to use prostitutes instead of having a girlfriend, do it. If you have to eat at the kibandaski, do it. If you have to quit drinking, do it. If you have to live in a mabati shack and keep your head down for a while, do it. All that is temporary if you work towards saving up for a business that will get you out of poverty. Then, you will succeed and afford to date, marry, raise kids, and have a few concubines.