My tomato woes

I should rename this blog to reflect the life of my patio plants. I was getting so excited about my growing tomato. However, today when I was watering it I felt something weird on the bottom. I took a picture, but it just grosses me out (like gives me the goosebumps grosses me out). You can go here for more details on what is wrong with my tomato plant. My poor tomato has Blossom End Rot. So what do I do? Should I let the tomato keep growing? Can I still eat the top if the bottom is rotten? The article linked above makes it seem like this is hard to get rid of. So will every tomato turn out with this? I am so sad. I need someone with a green thumb to help. Help please.