Talking with a guy

I just matched with a guy on a dating app and have talked to him for only a few days. But I no longer have interest in talking to him because my life is so crazy. I don’t want that to be an excuse when I tell him so I can end it. He’s nice and all I’m just too busy for dating unfortunately which is fair to him if I keep things going on. What is the best way to word a message like this for him?