<human>: For more than half of the entire relationship with my Girlfriend of 2 years I have had the though of breaking up with her run through my head at least once a week. 

As soon as we have an argument or something goes wrong it's the first thing I think of, but I never follow through with it. However this is not the only time I think about it. some days I just consider breaking up with her because my life would be so different if I was to be single... not just in terms of the obvious being able to have random hook ups, but more so in that I could just live alone in peace and do what I want when I want without having to think about how it will effect some one else.

I understand that the grass is always greener on the other side unless you water it which is why I try to work on getting through our differences and constantly review in my head why I love her.

However, I still just cannot help but constantly consider breaking up with her and the other day I was very close to following through with it. 

I'm unsure as to whether this is something which should be occurring in a healthy relationship. I wonder if people choose to just be ignorant to the life they could have had/ be having if they weren't with their partner. Or whether in a healthy relationships people  truly love their partner so much that they don't ever consider breaking up. 

Is this a sign that maybe I don't actually love my partner and that I should break it off with her? I'm honestly so confused about my feelings and would love some advice.

Can you condense the text into a few key points?
<bot>: Constantly doubt whether I want to be with my girlfriend, is this a commonly occurring thing in healthy relationships or not?