I realised that I have very few friends, especially after I became a mum. How or where can I go to look for friends?

Personally I feel that it is okay to have just a few friends as compared to plenty because naturally most will start drifting away and become hi-bye friends. I will like to spend more time with my children instead of socialising when they are still young. But if you are really keen, there quite a lot of mummy groups on Facebook. e.g. SG50 mummies and daddies (https://www.facebook.com/groups/2015SG50mummiesanddaddies/?fref=ts) most of them have whatsapp group as well.