What should i do with my relationship seriously help?

Me n my girl friend have been together for 7 months now , at the first 3 months everything was going good not one fight , now its almost everyday we always mis understand each other or we cant agree on NOTHING a lil thing turns into a huge fight we just cannot get a long she talks to.me like **** but wen she wants to be nice i love it think her luv is what keeps me with her but we fight everyday she talks.to.me like **** ... On top of that she will always put her friends first b4 me there's sum friends she won't even take me around I.do.a lot for her n ya she helps me we just fight a lot so what should I do ?