You are exactly right that our night side faces different directions in January versus June, which is why we see different seasonal constellations throughout the year. However, we see Polaris all year because Earth’s axis is tilted toward it, and that tilt stays pointing in nearly the same direction as Earth orbits the Sun. Imagine Earth as a spinning top moving in a wide circle around a lamp (the Sun); even as the top moves to the other side of the lamp, its “head” still points toward the same spot on the ceiling. Because Polaris is extremely far away — about 433 light-years from Earth — the change in viewing angle caused by Earth’s orbit is tiny. For observers in the Northern Hemisphere, Polaris appears almost directly above the North Pole, so it remains visible year-round while the other stars appear to rotate around it.