Do you play any sports at all? Say maybe like badminton?

Then you can try this app called Rovo. You will join other circles of same sports interest. Say someone booked a badminton court with no one to play with. So someone can go on this app to "open" his court for others to join in to play. Sometimes there will be opposite genders joining, so you can to know some of them.

Even if there isn't, at least you can open and enlarge your circle of contacts as you know and meet more people and as it compounds larger, hopefully someone you will be mutually interested in one another.

It is not just badminton, there are also other sports activities.

Doesn't have to be this app, maybe there are other apps or FB groups for different things like those interested in books or books swapping FB group. You'll get more books to read, meanwhile also meet other people or join some reading club.