My guy asked if I’m going through a silly phase?

I’ve previously told him I sometimes just go out somewhere and stay away for hours because I need to be alone. Yesterday I went out for a while but came back in because it started to rain. So later in the evening I mentioned I might head out for a while. My guy calmly said: “are you going through a silly phase again?” He is a little bit of a father figure to me, so I don’t think it was meant as being condescending. But what did he mean?
My guy asked if I’m going through a silly phase?
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