Why does my honey always crystallized?

That's normal for honey. When you buy good quality honey, it will always crystalize, no matter what you do. The speed and crystalization and the appearance of the crystals depends on the plant from which the honey was made.

If you want honey that doesn't crystalize, you can go to the supermarket and look at the cheaper honeys. If they are liquid in the supermarket already, there is a good chance that they have been treated in ways which prevent crystalization. Alternatively, you can buy products which are a mixture of bee honey and other sugars, which can also be formulated to not crystalize.

found this on the back of my honey...

All pure honey will crystallise over time. This change is a sign of quality. It can be restored to its liquid state by loosening the lid and standing in hot water or removing the metal lid and heating gently in a microwave oven on the lowest power. However, don’t allow the honey temperature to exceed 40°C (104°F) as some of the goodness will be lost!