It's something everyone suspected, but now it's official: The under-30 crowd is addicted to their cell phones.

Those are the findings of a new survey, which showed that as millennials spend more time engaged on social media platforms, it's causing them to be less social in real life. The study, conducted by Flashgap, a photo-sharing application with more than 150,000 users, found that 87 percent of millennials admitted to missing out on a conversation because they were distracted by their phone. Meanwhile, 54 percent said they experience a fear of missing out if not checking social networks.

Nearly 3,000 participants were asked about how they felt about social media in social settings, and found that the guiltiest culprits are often females. The study found 76 percent of females check social media platforms at least 10 times when out with friends, compared with 54 percent of males.



The most commonly used apps mentioned in social settings among millennials were Snapchat, Tinder, Facebook, Messenger and Instagram.



Julian Kabab, co-founder of FlashGap said that people are too focused on looking at social media when they're out at events, and it may be costing them in social interaction. "People miss out on parties because they want to see what's going on, on social networks, take beautiful selfies and add filters to their pictures," he told CNBC.



It especially becomes a problem when there is alcohol involved and regrets the next morning. The survey found that 71 percent of users regret posting a picture on a social network after more than three drinks.