I made her (girlfriend) angry,how to make things as previous normal

we are in relationship since more than a year. Problem is that she asked me to tell my parents about our love because her parents are searching for her groom. My career has just started and I think I am not ready to take the responsibility of a family right now. I love her a lot and also want to marry her. Yesterday while talking about this topic I got very much annoyed as I was standing on road talking to her on call and first asked her to call when i reach home but she not agreed so I Swear her. now i am feeling guilty. I apologized also. she is very much disturbed. we chat through sms but she is very angry.I am helpless Tell me what to do?How to make things better her exams are also going to start she will ruin everything.