Social networking is fast becoming a staple for a growing number of adults as Web use surges. One-third of adult Internet users have a profile on a social networking site, up from 8% in 2005, according to the Pew Internet & American Life Project. And though adults share some teen habits — checking in with friends, planning get-togethers — they differ from the younger set in their desire to use the medium to meet new friends from across the country.

Their reasons for connecting with others online vary, but the passion for it is unwavering.