what to say to someone who is giving mixed messages

I have been seeing a girl who was giving mixed messages - she has said on a couple of occassions "I like you but I dont know what I want at the moment, my heads messed up but I want to takes things slow". I said that its either one or the other and just decided to call it off. However we agreed to go out this week and i just said as friends nothing heavy.

I have thought about it however and decided that whilst I do like her, I dont see the point in still going out as friends and that maybe its best we dont.

What would be the best way to go about this? I want to make this clear and call it off but also dont want to scare her off. If anyone can advice would be much appreciated.

My advice is to rethink your entire approach

Your desire for clarity shows neediness, if you stop making her decide and are more aloof and show higher value, she will start pursuing you

Giving an ultimatum is major AFC, you shouldn't jump into a relationship with someone until you're pretty sure they're right for you anyway

Have fun, date, enjoy yourself, evaluate her but don't get caught up on her

You gotta be higher value, you are screening her not the other way around

Tease her, put up false barriers, two steps forward one step back. Give in to physical contact but stop it with like "no I promised I'd be good" or whatever, and make her pursue you

I know this may not sound like what you're used to but if you keep pressuring girls like that you're gonna end up used and frustrated. Stay in control

Key thing is just to have fun with her. Typically what I like to do is make my own fun during these dating types of things. Make the world fun for yourself and invite her to join you in it.
Baron is right you need to show her high value. You do this by doing what I said, right now your giving her decisions to make. Girls like to be led and hate it when a guy doesn't take control cause it totally turns them off.
Dont let her cloud your world, go on the date and just have fun. Wheres the venue?