Patriotism? Nationalism?

We often confuse ourselves about the concepts of Nationalism and Patriotism. And, this confusion is justified. I, on a personal basis, find these two to be entirely different terms. As a poetess, I tried analysing this, of course, because the idea was sparked by an article I had to write for a newspaper. Here's what I think. 

Patriotism and Nationalism are two terms in history, often misinterpreted to be the same. But when looked into in a deeper sense, these two words are two entirely different entities. Patriotism is more submissive than nationalism. It is, rather, the infant form of Nationalism. Patriotism is love for one’s country, while Nationalism can be related to pride in one’s nation. Patriotism is something more personal than Nationalism. Nationalism comes into its sense when it exists in a group of people, and is never identified when one person holds strong feelings towards his/her country. Patriotism can be described as a peace-loving emotion; it is not possible for a war to arise merely out of patriotism. Nationalism can get so intense that a war is almost always the direct outcome of it. Patriotism is the base of Nationalism. When we look into Indian history, we observe that every Nationalist was a Patriot, but not every Patriot was a Nationalist. To illustrate this, a number of landlords and merchants loved India, but were on the side of the British. They were Patriots, not Nationalists. On the other hand, leaders like SC Bose were Nationalists, whose wish to see India as a free nation arose out of that tiny bit of Patriotism in their hearts. Patriotism forms the base for Nationalism. Patriotism is personal, and may or may not be communicable. But nationalism; it spreads like wildfire. Patriotism is a choice, while Nationalism is an outcome of extreme Patriotism. This is the little but huge difference between Patriotism and Nationalism. 

I'd like to know various others perspectives to this. Use the comments section!