<human>: Can you summarize the given text in a few sentences?

She's my first official girlfriend. We moved in together quickly (after 2 months), and it's now been 6 months.

She says complimentary things to me when she is in a good mood, and generally treats me sweetly, but she pretty much always talks about herself and focuses on herself. For example, she can literally recount her day in fifteen minute intervals without listening to more than one sentence about mine. She never wants to go out and do things (like when we first got together) and takes life more seriously than I do, then it seems to be my job to comfort her all the time.

If she is feeling sad she demands that I comfort her or say nice things to her, which pressures me into making positive statements about the relationship that I do not genuinely believe. She talks about being together forever, but while I am fairly content with spending time with her, I just don't think the connection is that strong.
I feel like I rushed into things because of the insecurity of having never been in a relationship, but now things are very serious, and it appears on the surface that things are going well.

Other info: I am financially independent, with a career and an ivy league degree, good looking, and have supportive friends and family. I just have lacked confidence in forming serious relationships in the past (and you don't want to complain to your friends about the person you are with). I really just want to be alone again, which I am used to and enjoyed.

So, I feel like the obvious advice is to break up with her, but she is insecure and may feel betrayed. I feel like I am a bad person for breaking up without ever really expressing my feelings or a bad person for staying with her and pretending I think she is the one. How can I tell her she needs to change her personality fundamentally (e.g., taking a genuine interest in my life/interests) or that I am breaking up with her because I don't believe she is capable of that change?
<bot>: Turns out she is narcissistic, but I am in deep and don't feel comfortable talking about her deep-seated problems or breaking things off suddenly.