How to survive in Hong Kong?

I graduated from college in the states last year and moved back to Hong Kong 4 months ago. Hong Kong is my hometown actually. But the problem is I'm still not used to my life in HK. Here probably are the reasons :

When I lived in the states, I hung out with Americans 24/7 which means I blended in very well. Even alot of people thought I was American instead of a foreigner. I had many friends and I loved the activities such as partying, driving to friends' places, road tripping....I just love the whole western life. I know HK is an international city so it shouldn't be hard to meet westerners. Yes I met lots of people from America and Europe, I've been hanging out with them. But the thing is most of them have left HK or are going to leave soon because they're usually exchange students or temporary workers. Some people have told me that I need to make friends with local HK people if I want long term friendships. I tried but HK people don't seem to have alot in common with me.

Now I feel lonely actually. I don't know what to do.