I made a new friend this year which is great, but she's already talking about taking trips together. How do I slow her roll but in a nice way?

The new friendship stage can feel kind of fragile. Especially if it's been a while since you've welcomed someone new into your social circle. It also takes a good amount of time before you know if someone will be a good travel companion. And is there anything worse than being in a fabulous place with someone who's making you miserable?