For men only: What should I do when a girl tells me that our relationship is going too fast?

So I met this girl recently, less than a month ago, and we connected very well, we are compatible over a lot of things and for the part that we are not compatible with each other with, I believe I can live with that, as long as the partner compromises, you can find a middle ground for everything. Long story short, I'm looking for a serious relationship and she's someone that I can see myself with in the future, bla bla bla...

Now our parents know about the relationship, we are going out together and everything was going really well, but fast and I was also noticing that but it was mutual approach at first, means she also was going a little bit fast.

However, we had a talk that we should take things slower and I agree with her about that, but since then I feel like everything changed, we are not calling each others anymore, we are not texting as much, and we are going out less.

What do you think I should do in this case?

(Just to mention, I'm an over thinker, and I'm looking for a serious grown up relationship)