Marketing will help you. According to the marketing laws, the best place to find what you need is where the target audience is continually gathering. You need to describe to yourself in details your probable future girlfriend. Her occupation, appearance, hobbies, etc.
Make a detailed list of superior qualities.
Then you need to think about where the probability of meeting such a girl is the highest. It can be a library, cinema, museum, exhibition, office, shop, seminar, training, etc. As a result, visit this place.
In this case, your chances to meet a woman of your dream will undoubtedly be tripled.