How can you tell when you stop liking someone?

I started dating this guy a month ago. I was very nervous and excited at first but everything started moving too fast for me. He started hanging out with my friends and often at my house. He is a nice guy but his feelings are a lot stronger than mine and it feels overwhelming. Now I worry about seeing him, and I don't think I give the same energy back. I try to but it feels so unnatural. It's starting to gross me out. I have told him that I need more space and to take things slow but he is worried that I gonna leave. I can't seem to find a balance. I'm not sure of what to do, or whether I even like him anymore because every time I think of him it just stresses me out. Can't figure out how I feel. I am thinking maybe I'm just not ready for a relationship and should just call this whole thing off.

How can you tell when you stop liking someone?
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