You say just any variation of "I can't do this anymore" via text, phone call, or in-person conversation yikes. And, here are some runner-up points to help with the transition: Karma or timely comparison experience? Saying that you don't think you're right for him is basically a nicer and still valid way of saying you don't think he's right for you. Long reads. This is why I chose to do my masters research in the area. You owe it to the person you're seeing to tell them that you're not interested, so you can move on and they can, too.
There are a lot of benefits to moving in together.
Do You Have To Break Up With Someone If You Aren't Officially Dating?
Your ex will thank you, and you'll appreciate it when you're on the other end in the future. I'm pretty sure you feel the same, but I didn't feel a romantic connection. Subscription offers. Tech culture. You owe it to the person you're seeing to tell them that you're not interested, so you can move on and they can, too. Don't keep sleeping with them if you know they want more.