Generally speaking, most people should refrain from spending 3 times more money on brunches, romantic dinners, etc relative to what they make per hour. For example, if you make $20 an hour you ought not to go beyond $60 or more on your first date.
You clearly can't afford that lifestyle. You just want to show off but the question remains: will you be able to maintain the standard you have set in regards to future dates? Eh, probably not, and that's the entire point I am making.
Any person that expects you to spend more than that is definitely out of your league.
They are pretty much high maintenance just like what
@Chidinma pointed out in her post.