Just taking a quick selfie on the lock bridge of her kissing your cheek? Yep, the relationship is doomed.
According to a recent study by Florida State University, posting selfies on Instagram is harmful to your romantic relationship. Researchers had 420 Instagram users ages 18-62 complete a questionnaire. When the results were examined, they found that an increase in selfie posting was associated with both body-image satisfaction and Instagram-related conflict. The researchers also found that these factors led to "increased negative romantic relationship outcomes."
Basically, this means excessively posting selfies could be a sign that you and your significant other will soon stop being #cudddlemonsters and start fighting. Of course, it's just one study. So, it should not be taken as concrete fact.