What's the best way to counteract feeling lonely?

Hi. I'm in a new town, moved all the way across the country to start a new career and I've just been feeling really lonely the last couple of days. I recently dealt with the loss of my mother and the re-emergence of a painful ex-relationship into my life, and it's all been quite affecting to say the least. I'm 24, I consider myself to be "social" but I'm not the type to just go out to like, a grocery store and make friends. Any advice?