<human>: Heres the abridged story, throwaway because she knows my reddit account. 29 y/o male sating 30 y/o female.

Have been dating this girl for the last 18 months, and I am completely in love with her.  However, I blew it.  I have been increasingly busy at work and it has taken a real stress on me, and I have not given her the attention she has deserved.  I hate to say it, but I put work before her and neglected her, we had gotten into fights and she reached her limit and wants to break up. 

She thinks I don't care as I haven't been there for her.  However, it is the complete opposite, this is the girl I plan to marry.  For the last week (after we got into a big fight and she wanted to break up) I have been trying to do everything in my power to show her how much I love her.  She has been very distant, she wants to talk, but has basically not been responding to me.  She is a musician and has a show tomorrow night that I will be going to...  Reddit, what do I do to prove to this girl that I will do anything for her?  Grand gestures?  More apologies?  I am willing to do whatever it takes.  Thanks so much for you wisdom in advance, and sorry for the awkwardness of the post, my head is not in the best place.

Summarize the given text in a few sentences.
<bot>: GF wants to break up because I have been neglecting her for a bit because work has taken over my life, what do I do to win her back and show her my love and devotion?