Her take: “I went out with a guy I met online who seemed really sweet and charming. A few days later, he texts me to say that he isn't looking for a girlfriend—just casual sex.

I felt cheated and hurt.” -Andrea C., 31Expert take: Even if a guy doesn’t say straight out in his profile that he’s only looking for hook-ups, some will offer hints.

Yet just 15 percent of American adults say they have used an online dating site and/or mobile app, up from 11 percent in early 2013, according a Pew Research Center survey conducted last June and July.

Meeting offline, face-to-face, remains the most common way couples who go on to marry first meet, according to a study by University of Chicago psychologist John Cacioppo.

And as for Tinder, sure, it can be used for swiftly finding a one-night stand, but there are If your life is too busy to squeeze in the time-consuming intricacies of a longer-term relationship, or you're just looking for a little low-stakes fun tonight, you need a quick, surefire way to find a quality fling.At the same time, among those 55 to 64, the rate has doubled to 12 percent from 6 percent.For many college students, meeting a partner still most often involves people right in front of them in lunchrooms, classes, parties, or dorm rooms.This week marks the biggest online dating week of the year (combined with the biggest divorce week of the year).Whether it’s a failed relationship or the urge for a new beginning that has propelled you into the dating wilderness, online dating almost certainly has someone waiting for you. Match group now owns Tinder, Plenty Of Fish, Ok Cupid and, of course, Match, making it the biggest player in the online and app dating industry.