<human>: Can you give me the gist of the text in a nutshell?

Last night my friend (45M) and I (16M) were out celebrating my mother's birthday. We had a few drinks and a lot of banter. Mainly him having jokes aboht my girlfriend and her mother.

Well....

I get back home were we're all staying. And I decided to get my own back on him. I started speaking to my girlfriend, let's call her Ruth, and her mother, let's call her Marry, via Ruth.

It starts off pretty jokey and it's all a bit of fun. And then she said "I'd go out with him if he asked me out". I then came up with the fantastic IDIOTIC idea of setting them up. 1 o'clock tomorrow I said. They'd meet up and have drinks or somthing I said. Well turns out Marry really did like the sound of Dave (my friend) and was really looking forward to it.

So today. I'm sitting here pretty much begging Dave to go meet up with Marry and he's just saying no. I've fucked up bad. My girlfriend was pissed at me already and now I've probably hurt her mum which she will never forgive me for.
<bot>: Got drunk, set up GFs mum with friend. Friend wont meet her and she was really looking forward to it. On top of that my girlfriend is gonna kill me.