How do I meet new people, and guys to date? (gay male)

I’ve been living in a big city for two years now, and met lots of different people, including guys, and had short-lived romances, but now things have really ground to a halt. I definitely had more enthusiasm and social energy when I first moved here, which I think made me more attractive, also because I was new. I met a lot of people online, and through dating sites.

I’ve tried to stay offline, but since then I’ve had trouble meeting people out and about, and I do go out a lot. I’m very shy in approaching people, despite seeing many potential guys I’d love to talk to or get to know, I never have the courage to even just say hi. And then when I do meet people, I realize how particular I am and that I am better off going after the people I like instead of just seeing what comes to me…

Basically, I’m trying to figure out if I need to make a conscious effort in approaching people, or if it’s just not in my personality (introvert), and maybe I should just engage in social groups of some sort, and stick to the online thing… Online has worked well for me in the past, but I really prefer the feeling of meeting someone in person and knowing automatically if I am attracted to them. Any thoughts?