I think you’re saying that after dating for two years, you’ve been arguing about petty things lately and you’re both becoming tired of the relationship because of this fighting.
I can tell you that the old cliche, “relationships take work,” is true. The way you can get out of a pattern of arguing is to change your behavior. 😉 Just because you have a feeling doesn’t mean you should express it. So if you’re annoyed with her for something she does, you don’t have to tell her, which will probably start an argument. Same goes for her. Another trick you can try is break your pattern of being together and what you do together. If you feel that you’re in a rut, then shake it up. Take a trip, do different things together, invite friends to join you, volunteer, plan a project — whatever works for the two of you, do what you need to do to get out of the rut that has led you to fighting. And third, try giving the relationship some perspective. You don’t have to be everything to each other. You can have a healthy, happy relationship where you spend time with same sex friends and doing your own things as well as regrouping to do things together. Balancing time together and time apart may help.
I hope that helps. Let me know if you have any other questions.