Let's look at the facts shall we?
- she has male friend
- these friends are ready to jump in every time when you cant make it.
- she tells you about them( no fear )
-she still goes to the party even though she probably knows it bothers you
First of all you should not go too deep with women like this , but that's easier said than done. You are 23 , tricky age though.
These is indeed a f up situation, as in you messed it up. It's a real b1tchy reason to cancel ( chilly wheater). So now another dude is willing to take your place and the first comparison with him is already a loss for you. Women don't like whiney men, especially when they dont even complain about the circumstances.
What to do? You could still go. But now this other dude is already a part of it. So perhaps you just gotta ride this one out. Look at it as if your testing her. So DONT
text her amd check up on her, actvlike you dgaf. Her behaviour tomorrow will show you all you need to know.
Next time just go , and decide with the same alcohol in your body whatbwio be the next move . Maybe she would agree , have a few drinks with you and than back to your place.