We got on a good tone fast and when I asked her on a date she seemed really exited and suggested we cook at my house. We flirted back and forth and used a lot of the "romantic emojies" talking about our interests. 

After setting the date for our first date, she now after a few days seem less intersted. She writes smaller, less exitable messages and only one message a day. The date is comming up in one day, and as she only writes one message a day now, agreeing upon time and sending location will not work. This is info that can be convayed in 10min, not 2 days. Very wierd.

A strange thing from the beginning is that she only messaged me after 20:00PM. She also said that she never had gone out drinking/partying till 05:00. Dont know if it means any, but thats a bit wierd where I live. 

I dont know what is happening now, we have agreed do a date but she seems not that interested anymore, I tried to confirm the date and she replied with just; "yes, that works good" with on it self looks good but in context to how she previously replied, a bit bad. And we have not set a time for it, and she does not know the location either.

Should I take up the sudden change in responens and ask her directly if she is interested anymore? Or maybe suggest a new location/activity for our date? Or just leave it to be? what should I do?