Also if you are asian and start talking in perfect English like George Takei they're going to assume you're perfectly extroverted and an expert on American social cultural norms and behaviors, oh good how nice and stressful if you're introverted. But if you're just good enough to communicate most of the time while clearly putting in some kind of effort, they'll cut you a huge amount of slack, regardless if the actual problem is you're all introverted anxious exhausted. He's not terrified to be talking to a pretty girl, he's just having English troubles, no problem.
Do some group sports. Yoga, dancing, skateboarding, table tennis, whatever. Go to clubs, or bars where people talk. Introduce yourself to people. Eventually, when you keep going back you'll make some friends.
Are you into music or art? Why not go and see some shows? Or take a life drawing class or some such. Maybe start collecting records, or join a photography group.
Don't talk about your job with people. There is nothing people find more boring.
Keep getting out there, and have fun :)
for anyone here learning a language, check out:
http://www.fluentin3months.com/
The TLDR on that site (and his book) is basically conversational practise (anywhere you can get it) is much much more important than lessons, which are too different from how our brains are designed to learn languages (which is by usage, not grammar rules.) I would say that this is especially true for someone who can already write as the OP can, but just has trouble with confidence in talking to people in person.
The key lesson for OP from FI3M, is that people are very infrequently angry with you for speaking their language wrong. English speakers may have more of a sense of entitlement than speakers of other languages (dominant culture, etc) but in general people will do their best to communicate, however slowly (assuming you catch them in a situation where they have time.) A good way to do this is meeting someone for coffee explicitly to practise English. Either they can learn your language in return, or you buy them the coffee, obviously! :)
(edit: situations where you can do this! You could always "buy an English lesson" from someone, I suppose. You could also arrange to meet someone you met at an English class on a different evening, in order to practise together, especially if your only common language is English.)
What a horrible society we must have if it enables this; insular, isolating, compartmentalizing.