<human>: Summarize the given text in a few sentences.

Been together 2 years. 

I just can't shake this nasty feeling. She's his "one that got away"--he was borderline obsessed with her while they were dating (this was three-and-a-half  years ago). He recently he added her Facebook, saying it was casual and he just needed closure. But he's liked and/or commented on almost everything she's posted, even what I consider to be obvious beauty photos (a.k.a. "tell me I'm pretty" selfies. No judgement--I've posted them too. My husband says he hates selfies, and yet he likes hers?).
<bot>: Husband reconnected with ex-girlfriend, seems too interested in her, I'm uneasy. Am I being paranoid? I've been paranoid before.