I am this close to dumping my girlfriend because she treats me like ****?

everytime we see eaqch other its because she wants something, i have been with her for a year and 3 months and in school, everything was school, but since college started, everytime we meet up she always makes an excuse not to come " mom saId i cant" "dad might not let me" bla bla whatever whatever. Yesterday she asked to meet up and i said ok and i told her to stay for atleast 2 hours but once she got the top up from her phone and needed me for whatever she needed she went home and claimed her sister was bragging her to go home. Her sister was with us and she said "you can stay if you want" and my girlfriend just did not reply or look at me and just walked off and then said bye, and i felt so hurt, im this close to leaving her and i told one of my good friends everything, and he toild me he hyad a girlfriend like her and she is not a good girl to be with and the best thing was to leave and find someone who makes me happy and that a girl like her will always give tears to make a guy go back with them etc

she has not texted me the past day because i spoke to her and she said im jus being nonsense andf i said im not and she posted on facebook "why do we hurt our loved ones" and then later wrote "feeling like **** now feel like nobody cares about me anymore" she wrote the second one because i did not text her and i went to bed ?

Thanks in advance