Just based on what I read, it almost seems like you might be forcing the issue. What I mean by that is it is almost like you're in a rush to have companionship and are willing to try several things to make that happen. Just live your life on your terms and let what's going to happen, happen.

You're an introvert and that is a good thing. Just do the "normal" things, go shopping, walk the dog, catch a movie, etc. If / when the time is right, the companionship you're seeking will fall into place in my opinion. You state you have one or two close friends. Believe me, you're blessed. I am a firm believer in keeping my "circle" small. I'm a quality vs. quantity-type person.

There's a huge difference between being lonely and being alone. Just be sure you know which is which. The important thing is your happiness.