He was out all afternoon yesterday, doing a sponsored walk for charity (obviously I'm not complaining about that) then came home for about three hours and went out again for a mate's birthday. Said he would definitely be coming home rather than staying out but when DS (18 months old) woke up at 4am I realised he was still out. I called him and his phone was off. Rung one of his friends, they put me on to him and he was still awake, party still in full swing. Sounded quite annoyed that I'd rung and said he would be back but was pretty vague.
I couldn't get back to sleep after that and DS woke up properly about twenty mins ago so now we're up and when DH does get home, he'll be useless as he'll need to sleep for a good few hours before he can help with anything. I probably am being unreasonable as it's not like he does this every weekend. And single parents do have to cope on their own weekend. Actually, reading that back makes me realise that this thread sounds petty and spoilt 
I do feel really annoyed though! Can't help it. Aaargh!