<human>: Tonight I was walking my friend through his own relationship situation when we spoke about having our SO's passwords. So I text my SO of one year requesting his password to his Facebook. I did not beg, he gave it willingly and I told him I would go through it to cure boredom. What I found was:

* How cute his friendship with his best friend was.

* He doesn't talk to many people.

* Flirty messaging between him and a friend I've never met that's pretty recent.

This bothers me. A lot. There was the calling of sexy and "i love you"s being given. I guess (because I couldn't continue reading without fury) they've been friends for a long time and wanted to meet up. However it was peppered of them saying how their partners wouldn't approve and he leaned towards lying to me so they could meet up if I said no.

The 'i love you's piss me off the most since he wasn't sure he loved me for a time. Hence twice he's confessed that he loves me which makes me angry that he'd say it to someone else. You could argue that it's in a friendly way, but he's said before that the only people he loves are his family and currently (but not for long since this will not be a pretty conversation) me.

Now I'm sitting waiting for him to have time so we can talk about this because I feel pretty slighted because how can someone who's been cheated on flirt on Facebook and say things such as "well you're the back up" behind my back.

I need advice on how to approach this reddit.

Give me the gist of the text in a nutshell
<bot>: Boyfriend has been flirty messaging and calling another girl sexy behind my back. Found it in his archived messages on FB. They talked recently. Help