If someone goes for a haircut, does it increase GDP? If I go for a haircut, am I causing the GDP to rise because consumption is rising?
Existing answers are correct, yes, you are increasing GDP.
GDP is a crude measure of how much is spent during a year. This is used as a proxy for living standards (the thinking goes: if an economy is spending more, there's more economic activity and it's probably doing better).
But the logic doesn't always hold, for example:
Consider a scenario where you break my window and I break yours, and we both pay the glazier \$100 each to fix our windows. Our living standards are unchanged, despite the fact that our actions increased GDP by \$200!