Why did guy say I came on too strong?

Guy said it scared him how strong I came off and he didn’t know how to handle it. He said he’s also messed up in the head when it comes to emotions. But he jokingly proposed to me two weeks after us meeting and first date he offered to buy us a house. I laughed it off but he said I came off too strong so what does this mean

Why did guy say I came on too strong?
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