You need to get your signals straight with him now
And the easiest and clearest way to do this is not with signals at all. It's with words.
John, (or whatever his name is), I think we're moving too fast. I would like to slow down and savor this early time when we're getting to know each other. I am sorry I wasn't clear about this before.
And for God's sake, stop being sexual with him over text. You are creating an environment of mixed signals and it's not fair to him.
If he gets angry with you for telling him the above (or something very similar), then you don't need to hang around with him any longer.