#oops! Nina Dobrev and Austin Stowell are dating, but weren't following each other on Twitter

File this one under #millennialproblems: Nina Dobrev and her new beau, Austin Stowell, are dating, but the pair only recently -- and publicly -- acknowledged that they weren't following each other on social media.

That's totally a big romantic no-no these days, right?

Stowell, 30, who made his...