<human>: Can you condense the text into a few key points?

I have no idea what I feel toward my girlfriend anymore. 

Im currently in a relationship with my girlfriend of 1.5 years and I love her a lot, but I only get a chance to see her once a week. In the rest of the 6 days we get into spats about absolutely anything (we both have our own opinions on various things).  And it just gets so annoying that I just want to leave.

Every time I see her though at the end of the week I go back to as if we first started dating and I love her all over again. But when I'm not with her I think of dating other girls and 'living the life ' of a 20 year old. 

I don't want to break up with her because she has changed her life so drastically for me ( she got braces for me, changed her education for me, stopped talking to her friends). I also don't want to break up with her because she is an amazing girl and we compliment each other really well... But I still want to see what else is there for me.

Mind you, that we always talk about the future and us living together and married and whatever. 

What should I do? Suck it up and just deal with it? Or is there a way to just go back to her when I'm ready to settle?
<bot>: girlfriend is amazing, I see her once a week. For 6 days I think about other girls for the 1 Day I see her I fall head over heels. What should I do?