This is a life pattern that needs to be broken. You can move to different cities and different countries but if you continue to follow a life pattern that does not create lasting friendships then the pattern of living a lonely life will just follow you wherever you go.

I never consider people I meet in pubs to be "friends" and am extremely wary of flirts. I avoid game players at all cost; life is not a game and I am not a toy. I only consider them friends unless I've known them for a long time and have shared meaningful personal talks / experiences with them. I have to know a person for months before I will open up. You seem to be more trusting - maybe too much so?

Have you considered counseling? You need to make some trustworthy friends - both female and male. Money may be tight but counseling appears to be an investment you cannot afford to pass by.