Noticed this thread and thought I'd throw my 2 cents in on a couple things mastercom said.
mastercomsif she just says she is busy she might be trying to tell you no in a nice way so please don't be pushy about alternatives.
If you're the kind of person that will just rethink this over and over In this case I'd recommend asking if she was just trying to be nice and if she's just not interested. Say goodbye, and leave them alone if they're not interested.
Generic and admittedly rather blunt response example:
You: Is there another time/day that you would be available, or are you just trying to say no nicely?
Them: I'm not interested, sorry. / I'm already with someone else.
You: Thank you for being honest, have a good day/night. and If applicable you could end with "See you in class tomorrow." or "See you at work next week."
At this point walk away, don't sulk, try looking on the bright side you just approached someone and asked them out and even if rejected that's still a small victory.
In most cases you really don't want to make a significant conversation after this as it'll just be creepy and or awkward for both of you. That being said this isn't 100% true for everyone but odds are if you're asking/looking for this advice you should probably get out of the conversation sooner rather than later. This is also assuming you don't know this person all that well to begin with.
If this is someone you run into regularly via work/school or they live right next to you just treat them like you would any other random person you kinda know and think is an ok or decent person.
mastercomsplease dont impose yourself physically or force her into some really uncomfortable position like against a wall. it's really nerve wracking and almost a red flag.
I would say that's definitely a red flag unless it was done to prevent serious bodily harm...
@op and tbh most US guys in general
A large percentage of women in the US have been a victim of some form of abuse (sexual or otherwise). Early on in a relationship the last thing you would want to do is trigger (even accidentally) memories of said abuse and have them be associated to you in anyway. Unfortunately you can't know what all those triggers are (unless they tell you). However you can mitigate a lot of common ones. Don't grab wrists/shoulders, in general avoid grabbing unless you absolutely have to (ex. preventing them from getting hit by a car) or they make it abundantly clear they want you too. Don't position yourself between them and easy exits. Avoid using an angry tone if at all possible. Stay sober, 1 or 2 drinks is probably fine but that's it. After a date offer a ride/walk home (or to their car) if they refuse do not ask again.