Agree with this. As long as you're not struggling to make ends meet, you're already fortunate. You could explore these options:
1) Casual Gatherings/Outings
Join forums/associations/etc and meet more people. There are lots of other people around facing the same situation as you. Meet more people and make friends with them. Connect with them on a personal level and establish long-term relationships (friendship, or even more).
2) Your Interests/Hobbies
Find out what you enjoy doing, and join associations/clubs in Singapore that specially cater to your hobbies. It's easier and more fun to make friends that way.
3) Re-connect
Re-connect with your long-lost friends from school, etc.
4) Explore the possibility of getting a Girlfriend/Wife
There are an increasing number of singles in Singapore. Go on dates, etc. There are many avenues specifically catered to these (e.g. ://.meetup.com/cities/sg/singapore/singles/). Go in with an open mind. Even if you do not find a wife there, you may be able to find some good friends.
5) Social Work
Help the needy; it's fulfilling.
The main point here is that you're not alone. There are many Singaporeans out there who are in the same as you. Try to attend events and find friends there. Often in life, you do not need to have too many friends. Having 5 very close great friends would be more than enough.
Good luck!
