Mixed signals? Where do I go from here?

Relates to previous question.

guy and I have continued seeing each other (just in the evenings, never out) and we continue to have wonderful conversations. Yet he still pulls away sometimes, rather drastically. To the point that he tells me it’s only about the sex for him.

but then let’s me meet his son? That he’s notoriously protective over and devoted to (rightly so)? And the three of us hang out at a carnival, he lets just me and his son go on rides etc. says they both enjoyed the time? Same thing a week later going to the movies, and helping me with my car no questions asked. But then we have lunch and visits me at home and suddenly distances himself again? I am so beyond confused by all of these mixed signals. It seems and feels like there’s more to this, but then some of his moves say different. I just want to know if I’m crazy or if there is actually more and he’s just hesitating? Any advice/insight is appreciated

as always, willing to clarify as needed

Mixed signals? Where do I go from here?
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