Damnnnn
He's got you in the position of his mum. Policing his behaviour, telling him he's not going to his xmas do, meting out punishment. I mean, quite rightly in a sense, he sounds useless. But the fact this is coming from you and not him doesn't instil hope he will change or see what's wrong about what he's done. If I had a partner who kept me awake sick with worry for such a long time and then came up with a crappy story instead of told the truth I'd be gone. That's seriously disgusting he put you through that.
Nokias take forever to die, and why would he go out without it being charged if it was almost dead already? I don't buy three grown adults all neither use Facebook OR know about the messenger feature, unless you're on the moon you know that you communicate via Facebook. If I were him then rather than keep my partner up worrying all night I'd have set up an account, it takes a second! And found and messaged partner. The fact he didn't even bother to do that in all of those hours is shocking!
And he apparently has few friends he sees, yet enough close friends to go on a bender with and crash at their home where they're happy to have a vomiting hungover man on their sofa for TWO nights?
People lie for their friends. There's every chance a story has been whipped up to cover his arse. Ahh man it's awful he's got you swallow his BS, I'm so sorry. I know it's harder to acknowledge the painful truth than it is to just accept the pleasant lie as you'd have to deal with the consequences then. He's put the word 'mug' on your forehead and it'll happen again.
I hate to say this but I think you should get an STI check. No decent family man goes on a massive bender like that and leaves his partner sick with worry at home with the kids and risks her wrath unless there's something REALLY compelling to stay out for. Sorry you're going through this but you need to wise up a bit, he's feeding you nonsense.