ETA: I called and left him a message. He's been very sweet, but it's not a good match, and I think he deserves more than a text.
We've only hung out three times, had the sex once, and that's how he primarily communicates, when he does communicate (which is one of the things that drives me nuts.) I mean, he is 26. That's what kids do, right?
This is the text: "Hey there. So, I've been thinking about this, and I'm really sorry, but I can't continue dating you. You're a lovely person, but we don't have enough in common to make it work. I don't feel long-term potential, and I'm not a casual dater. I really wish you the best of luck, and hope you find a great match."