Kids don’t snap your fruit, the devil does.

Water grown tomato plant, what do I do now?

 Ok, I tried an experiment earlier this year. I planted a tomato seed, let it grow a bit and then hung it over water with the roots barely touching the water. I only refilled it maybe, halfway, one time. They call it “water ?” something, I forgot. I did it around April or May and now it looks like this. It never blossomed but the plant is still just maintaining I suppose. Look at the roots! What do I do now. I don’t want to kill it or throw it away. Any suggestions?