You should watch "Journey to the Secret Life of Plants", interesting documentary on that subject. The fact that plants feel and think is kind of covered so that nobody thinks about it anymore... but you should watch it, you would find many interesting things about plants, that you never suspected.
Anyway, the fact that plants feel, doesn't justify AT ALL, that you should eat animals. I know what comes next... "so you eat the lettuce and hurt it??". Well, the fact is that we don't need to hurt plants to eat. We feed on the things that fall from them or we take from them when they're already dead: grains (and therefore pasta, bread, rice...), legumes, fruits (both sweet fruits like apples, and other fruits like tomatoes, cucumbers, squash, peppers, eggplant...), and nuts. That way we don't hurt plants either.