What Is This Plant?

I have a plant growing and don't know what it is. I received dragon fruit seeds about 2 months ago, but a dragon fruit never grew. I had the pot sitting outside on the porch and have it now sitting on my kitchen window sill. It's been growing great, is getting taller and taller, and yet, I can't identify it. The longest leaf is about 5 inches long, semi glossy, and has a hairy stem. I wonder if, while sitting on the porch, a bird might have dropped a seed in there? Please, someone help me identify it, so I know wether to throw it away, plant it outside, or if I should leave it be.