In everything that we do, whether it be life,career, or relationship.
The golden rule is - "If things aren't going as you'd want it to be, DO NOT try to change others, as they can't be changed and you'll be screwing things up bigger, instead CHANGE YOURSELF first, and things will reciprocate".
I agree with both TTBB, and RockStarParkingDude, relationship needs effort from both ends to run, you can't clap with one hand, but to make THIS happen, i think, if you're a MAN, then you gotta take initiative, step up, and make changes to improve the current situation.
--> Take the lead, and your girl will follow (and eventually you'll see changes)
Now, RockStarParkingDude had his point too, that you should not do things that you don't like to make her smile, don't force yourself.
BUT THE FACT IS, there are too many little things that you can do (and you won't hate to do) and make her day, yeah, do her sweet stuff, give her APPRECIATION, take the blames, sometimes, even if it's not your fault. I'm not telling you to be a smaller man than your girl but if you can be a man, and back down from a fight, clear the fire, and say sorry (even for nothing), she will most likely do the EXACT SAME, probably even more - how about a make up sex? It's always been hot.
You don't have to win in a fight every time, especially if you have already win the girl's heart. That's more than anything you'd want.
Thing is, that's the way relationship works. It has stages that you have to overcome, don't expect a relationship to be happy yappie all the time, you gotta accept that fact. Relationship is INDEED like a job, a life long one, once committed you have to work your best to top it off everytime, and you will get your salary paid well and probably even bonuses if you're good enough. Only difference is, this is a job that you want to enjoy, and won't feel tired doing.
Arguements are ALWAYS there in a relationship, the problem is - HOW ARE YOU DEALING WITH IT. If you're not doing a damn thing to improve this then it's your fault, if you're doing something but doing the WRONG Thing, then you gotta learn how to do it, and not leave when things happen.
Because, ultimately, I can guarantee that 99% in the rest of your life, you will NEVER get a perfect relationship ever, are you going to run away every time?
A great relationship is not about meeting the perfect other, but instead, making the perfect other.
And let me give you a final piece of advice. If you can't feel enjoy doing things for her, make changes for her, then from a man's point of view, you're not in it big time, not just for her, but for any girls in your life, you're just not prepared for a relationship. Period. Break off with her, DON'T WASTE HER TIME.
---> DO NOT always think what others can do for you, but think what you can do for others. All successful relationships, even BUSINESSMAN do that. If you're not gonna make changes because you're so afraid that she will not even reciprocate, then just screw that, you're not even trying.
And even if you have been trying, and still she's the same, you're not doing it enough. How about tweaking it up a 300% and see how things will flow?
"So you mean I have to work more than her to get this relationship straight?" Well, if you're thinking about this question, then you gotta drop it. Relationship, especially true love, is a selfless mechanism. I'm pretty sure, if you can do ALOT ALOT more and tip it off each time, you will eventually get out of this "Messed up period" of your relationship, and then things will go back to the same old sweet days again. I can almost promise that.