That is the great love of God. Within the Trinity there was/is/will be perfect love, harmony, contentment. God didn’t need anything and would never need anything. He wasn’t bored. Instead He actively chose to make us in His image and share His love and contentment with us because of love.
In a very real sense you are correct, God chose to need us (believers). But we shouldn’t think we (collectively) are needed by God. God choose us. We don’t choose Him.
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