Becoming Vegetarian

I have read enough good about being a vegetarian and leaving non-veg food. In spite of that I cannot drop my eating habits. I strongly feel I have greed inside me that is not allowing me to drop this. If I sincerely wished for something good and of higher values, I have seen that nature supports. But here I know I shouldn’t be eating, but I don’t want to give it up either.
What should I do? I follow Art of Living and do my regular Meditation/Kriya etc. This is one thing I seek for Guru’s blessing to be out of, since I know that I have weak determination regarding this.
Please advise.