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

Throwaway account;

My girlfriend has never been a really intimate person, she has her signs of affection but lately those have begun to simmer down. For the past week I've seen her for only two hours and that was at a book convention where we spent at least half an hour apart. I told her that this relationship was beginning to feel like it was all a big show, that she liked the idea of being in a relationship with me, but that the actual thing was letting her down.

 Everytime I try to do something together she says she's busy and never tries to make an appointment for another day. But then she spends a lot of time with her friends or family. Today she went climbing with her brother for three hours, but she can't spare even an hour for me. She said this would change this week, but then that changed to 'starting wednesday' and I wouldn't be surprised if she changes that tomorrow.

The worst part is, when I see her I fall in love with her all over again. I have all these thoughts and sometimes I´m able to bring them up in conversation, but then I just shut down because I don't believe myself. And then, when she leaves, it starts all over.

When I flirt with her she shuts me down with a joke. Sometimes she doesn't respond for hours to a simple question, and if I ask where she was she is very vague about it. At this point I'm beginning to wonder if I'm just looking for an excuse to break up with her and seeing things where they are not present.

Which brings me to the other issue. I would never cheat on my girlfriend but I can't shake constant thoughts of other women. Not as in plain sex, but just dating, talking and being together in general. I can't believe I'm actually saying this but I would love to go down on another woman. And this makes me feel like a piece of shit. I'm just clueless at the moment.
<bot>: Am I making up excuses so I can break up with my girlfriend? Do I actually want to be with someone else?