do apple trees need to be near others to bloom, and produce fruit
a nearly dead apple tree is near this young one.
Certified GKH Gardening Expert
Unfortunately, it will depend on the cultivar of apples that you have! Some apples are self fertile, while others require pollination.
This chart will help you to know which cultivars of apple are compatible: https://www.acnursery.com/apple_pollinizer.pdf
This article will help you to grow apple trees, in general: https://www.gardeningknowhow.com/edible/fruits/apples/apple-tree-planting.htm