<human>: Give me the gist of the text in a nutshell

So my fellow redditors. 
As the this post suggests today/tonight I fucked up. 
My best friend/brother (known him since kindergarden)  and I decided to hang out with friends and go out for a drink. (Mind you I'm in Highschool and underage) . So anyways it gets to the point where it's around 3:30 am and I have a solid state of tipsy going on when my friend starts to make out with the girl I like/liked. Anyways things get a bit frisky between them and during the night there were a lot of other horny guys hitting on her and I kept shoving them away and told her I had her back. So now my fellow redditors, comes the true fuck up. My mate was meant to stay at my place, but because i have a curfew of 12:30 am we decided to stay at a friends place. So I call my father up and he's in a bit of a rage, but ultimately he lets me overnight at a friends place under the condition that i'm grounded for 3 weeks. So I say okay, why the fuck not, because the girl I like invited me to stay over. However. Now the fuck up actually comes. (Sorry for the extensive paragraph) so after a night out going to clubs/bars we head home to her place. My friend, me and her. So this is where I done fucked up. She offered for my friend to stay the night at her's too. (At this point we were sorta a package deal becaus he was meant to stay at mine) so essentially we get to her's and I'm still all confident that I might get some action, but then the girl discretely(without my friend knowing) asks me to leave. At first I look at her in disbelief, but then I say fuck it, you're not worth my time anyways. Sl I head into the guest bedroom and now they're getting it on and I can here them... Well fuck. I may have forgotten to mention that it's 4:30 in the morning, I'm tired, drunk and a furious at my friend. But I cant just peave because I have no where else to go.
<bot>: girl I like fucks around with my best friend while i'm in the guest room and cant leave because I have no where to go. Also I took the 3 week grounding to spend a fun Night out with my "friends"