<human>: Condense the text into a few key points

I'm used to being able to talk about relationship problems in a constructive and non-argumentative way, however I am currently in a new relationship (about 4 months), and we are getting into a lot of arguments lately (starting about a month ago).

Whenever I try to talk about our issues so that we can try to work them out, it always ends up as an argument, because she feels like if I don't agree with her, then I'm attacking her, or always trying to tell her that she's wrong. I'm just trying to understand both point of views and reach a mutual understanding that we both reach together.

I also have a hard time trying to remain calm during these discussions after a while, because she always makes assumptions on what she thinks I'm trying to say, before I finish saying my point, and then she starts responding in an aggressive manner to something that I didn't even say.... And then when I try to explain how she misunderstands what I'm trying to say, she would get so heated by that point that she stops listening to what I'm saying, and continues on her retorts about the assumptions she made about what she thinks I'm saying.

She has shown effort that she wants our relationship to work too, but we are having a hard time trying to work out a method of communication that will not spark heated arguments.
Any tips/advice?
<bot>: Girlfriend always views my attempts at having civilized discussions about our issues as arguments, and they eventually always end up as arugments. How can I improve our communication?