<human>: Can you provide a brief overview of the text?

She is 18, I am 21, long distance, going on 4 years. I am very chill and easy going, which makes me seem like an airhead. To make matters worse I have terrible grammar when I speak and tend to mix words and mispronounce things often. If I think about what I want to say then there ends up being long pauses in between sentences which makes me feel dumb (I am bright, aerospace engineering student with around 3.5 GPA, just poor grammer).

 My girlfriend has anger issues and comes from a family filled with divorces, no strong father figure, and an abusive drunk mother. My gf thinks I'm sweet and nice but not intellectually stimulating and that I don't care enough about our relationship to devout myself to thinking before I talk and listening to what she says. She has to repeat things because of my airhead nature I tend to get lost easily in details. My memory is not as sharp either, have a hard time remembering names of her distant family.

 She questions how much I care and love her and doesn't believe what I say no matter how I show it. Now she has just said she is no longer committed to the relationship if I am not committed. Any advice on how to either better myself or convince her that I do love her?
<bot>: I'm airhead with poor memory and can't speak correctly so gf interprets my actions as a lack of care/love in relationship and no longer commits herself to our relationship, how do I myself or convince her?