I always travel alone, a couple times someone has met up with me for a day or so, but mostly it's just me. If you stay at the same place during your trip, most likely there will be at least one other solo traveler that you can chat with. Usually if you smile at people, you become at least temporary friends, especially if they see you alone.

Another way to meet with people is at touring sites is to look for a lone person taking pictures. You can offer to swap picture taking duties so you will be in your own pictures and they will be in theirs.

Marguerite in Chicagoland