Friends always cancel on me when I want to go out?

Ok, so I'm a transfer student at a university in a city. I have a really close group of friends that I predominantly hang out with. Of course, I have other friends too, but on weekends, these are my go-to ppl.

I've always dreamed about going into the city and all the crazy nites we would have. My friends want the same too, they tell me.

The problem is, whenever I make plans to go out on the weekends, my friends agree, seem really excited, then always cancel. And the thing is, they look at me as if they never agreed to go out in the first place.

Honestly, I'll make awesome plans, my friends are really pumped, then on the day of the event, they cancel. Half of the time, I text them asking when they want to get ready, then they respond "oh, I didn't really think we were doing that. I'm kinda tired". Then, that night, they'll ***** and moan about how we never go out.

I was really pissed this week because I made monster plans at this awesome party at the school next to ours; I even had friends coming in from three hours away just for Friday nite. Then, my friends casually say, "oh yeah, i'm not gonna go" last minute

It really pissed me off because I was going to ask out this girl I really liked for a date on Sunday, but I figured I was gonna be too exhausted from raging this weekend, that I never called her. Now I have nothing to do all weekend except sit and reflect on lost youth

How can I change this? How do I get people to stop cancelling on me like this?