Is Fruit Necessary?

I love fruit, and I don't have any issues with digesting it, but I notice my mood, energy and testosterone levels decline after a while of having too much. I've noticed I do best when I just eat meat, raw dairy and veggie juice. Coconut cream is ok too, but since it's very expensive to make, I only have it about once every 1-2 weeks. Would it be ok to only have fruit once every 1-2 weeks also? If so, what fruit is best? I am thinking of only eating fruit that is currently in season in my area.