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

Hello,

I apologize if this is not following the guidelines, please let me know if so and I will rewrite accordingly.

I have been with this girl, lets call her D. Z. for almost a year now. I am still madly in love with her, however, I cannot see myself marrying her and was starting to feel slightly trapped in the relationship for three main reasons:

1. She was not successful, especially compared to me. I am a university senior, about to graduate, currently employed with a software engineering full time position. I am 100% independent of everyone. She has never had a job and is completely reliant on her parents, and is behind me in classes (even though she is 3 years ahead) because she fucked up in school a bunch. Her major is much easier then mine as well. (Business Management vs English, respectively).

2. College is a time for experimentation, I am afraid to be in a relationship right now because I want to go out and try new things.

3. I cant truly see myself marrying her, so I feel like I am lying to myself by going any further with this relationship.

So last night, I broke up with her. And I felt heartbroken, and so sad, and I could not stop crying. Why does it hurt this much? Why do I feel like I abandoned someone I love? What do I do? did I make a mistake?
<bot>: Broke up with girlfriend of 1 year for 3 reasons. Feel Heartbroken and lost. How do I cope? did I make a Mistake?