It depends really.
I've studied politics at college (that's British college, not the American kind) and one of the units was political ideology
basically, communism is part of the larger theory of what is usually referred to as socialism, usually anyway. by my count there are 3 distinct ideologies within socialism that could lead to a communist society.
the first is Marxism (if you already this stuff feel free to skim to make sure/skip). This is the original theory and within we see the stages of society, Marx himself said that he had merely interpreted history and it was up to others to act upon it. the first two stages aren't really important, with the 3rd being feudalism, the 4th being capitalism, the 5th being socialism and the 6th being communism. This is why some communists were in fact glad (in a way) to see that society was developing to become more capitalist, as this meant the stages were moving as Marx defined, which would inevitably lead to Socialism and then Communism.
The idea was that workers would realise they were being abused, and basically being treated as slaves, as they had very little money to spend on anything except essentials, meaning they were limited in life and could not develop themselves. When this happened the proleteriat (working class/ the people who work the means of production rather than own it) would develop a 'class consciousness' and overthrow the borgouise (the people who owned the means of production rather than worked it) and then they would communally own the means of production, all sharing equally in the profits it yielded.
Therefore, you could say in a roundabout way that she is a communist if she supports it because it will eventually lead to the workers suffering enough that they rebel. However, I personally believe this ideology is outdated and therefore not really valid as a way of identifying her as a Communist.
Next is Leninist-Marxism. This says basically that the Proleteriat cannot develop a class consciousness for themselves, and therefore need a vanguard party of people who are more intellectual to lead them to Socialism and eventually, Communism. Also, in this theory, rather than waiting for the stages of society to happen, it is said that capitalism can be skipped entirely and that socialism can be "manually started", so to speak. This is the way most Communist countries went, because as far as i remember both ideologies mentioned so far have a "dictatorship of the proleteriat" stage at the beginning of Socialism, to make sure that all enemies of the revolution are rooted out so that no resistance or attempts to revert the stages can be made. It is unlikely your friend is this as there are no longer any significant groups that overtly wish to start a revolution, so it would seem to be more sensible to go with the Marxian idea of waiting for fate to take its course.
Last is Revisionist Socialism. This states, in opposition to the previous ideologies, that the state is not a fundamental enemy of the people, and at that at worst it is neutral. At best, it can in fact be "captured" and used to gradually reform to Socialsism, rather than the traditional idea of a violent revolution to Socialism. In my opinion this is quite similar to modern society, as over the past century we have seen a large change in the freedoms that people are allowed, as well as the introduction of free healthcare and so on. Therefore, if your friend does say rhetoric about the revolution and also hates the current state, it is highly unlikely that she is a Revisionist Socialist.
TL;DR/conclusion, I would say overall that your friend is a Marxist Socialist, due to her belief in the revolution, as per the more traditional Socialist ideas, and also because she doesn't seem to be taking any distinct action described by any of the ideologies that would suggest she is actively trying to bring about the revolution. This would pretty much qualify her as one of the people basically sitting around and waiting for when the time is right and the revolution begins. So basically, yes, I would say that she is indeed a Communist.
P.S: I didn't mention the other versions of Socialism because they're basically even more watered down than Revisionist Socialism so it would seem highly unlikely that she belives them