TLDR: Is there a way to politelly let the girl know it's fine to say no when asked out & can it have a better outcome ever?

So I am getting quite frustrated by the fact that there are guys in this world that would make girls feel bad for rejecting them, and the fact it affects us, the respectful ones.

I've read a lot of threads like this and I understand why girls do that. But seriously, is anything I can do about this is just accept it?

There's this girl, she came over to my college dorm room because we were drinking with a bunch of friends and my friend invited her to come. She was vibing with us, two weeks passed. I asked her over to my place for some wine (she lives literally two floors below me). She said she's out with some friends but she's let me know later. She messaged that she's arriving but already exhausted, but told me I can meet her for a few minutes to talk a bit. I said sure, I'd love to get some air anyways. After the meeting, she said that she can come tomorrow. I messaged her at 8 pm the next day to ask her when she's coming out from work. She never responded since. I get it, you had higher priority things to do. I'd totally respect that she would prefer an old friend or whatever, just let me know. I know the more you chase the worse it can get, but honestly, isn't there just a way to tell her that it's totally fine to reject or say she changed her plans or that she's not interested at all?

Even worse, she could actually just change the plan, ghost me & then decide it's too weird to just message me later even if she's interested.

I am just kinda sad about it because it seems to me there are so many opportunities lost in life like this.

PS: The reason I invited her directly to my dorm room is because 1. she was there already 2. we had some chitchat 3. I wanted something really casual even if it was just a friendly talk