Hey Ben,
Sorry to hear of your misfortune. That sux! Don't worry about the woman, if she doesn't see your worth, then she isn't worth pining over and likely never was. The baby and the dog are the real tragedy in this one.
Look for the good in this event. Events or happenings, only take on a negative or positive meaning when we decide to apply a label of meaning to it, before then it has no meaning, it's just an event. So if you look at this event as a profound learning moment then you will take away a completely different meaning from it and as Djdojo says, you'll grow emotionally and spiritually.
In terms of the events of your entire life, this is another bump. Look for the learning in it, it may be hard to see from your current perspective, but look for it and you'll find it.
Leave the grog, it won't help, it'll just add a nasty hangover on top as the situation will still be there when you eventually sober up.

Cheers mate,
KH
PS. Love your philosophy dojo