I think we've exhausted ourselves already.

So recently I've been talking to this girl, and we have loads of things in common. The issue is that I feel like we've exhausted ourselves already, since our conversations these days have been a bit on the slow side and there isn't much to talk about.

I don't really want to stop talking to her because she's the first girl in years I've enjoyed talking to.

Any advice on what could be done to help revitalize the chats we have, so they aren't as slow & dead?