>be at party catching up with people having a great time but

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>be at party catching up with people having a great time but by this time it's slowed down and now we're reminicing high school and other dumb shit
>suddenly fuck buddy hits me up from the party she was at saying it's close to ending ~11 or 12PM
>asks me if I want to spend the night at her place
>send her an "alright" and leave my party kinda bummed out some of these guys will be leaving the state soon and I won't see them again for a while
>get showered and hop into some comfy shit
>figure I'll just wait until she lets me know she's outside
>it's almost 1:45AM and haven't heard from her so I send a text
>says she's coming by to pick me up for sure it's just that her friends dragged her to another party
>send her a text around 2:30
>tells me to sit tight, she's on her way
>be now, nothing

what part of my brain did the decision making in this situation? At this point she probably found a dude to fuck and was keeping me as backup or just went straight home. Part of me is thinking she's probably just minutes away, the other is pretty pissed and wants to go to sleep. What would you guys do in this situation? Is being petty ever justifiable?