You don't seem to understand that she is in a relationship. You don't seem to understand that there is boundaries. Women don't talk to their male friends after she is in a committed relationship. So, she will continue to ignore your obsessive messages. Yes, you are being extremely fixated and obsessive. You might want to look into how to change your ways of relating to people, this may be why you don't get any girls. Is this a person you actually know from somewhere or someone you met on Facebook? Let me tell you something, meeting people online instead of in person is not reality. You need to work on yourself, your self-esteem and ways that you are obsessive because you won't attract anyone unless that's taken care of. Girls can sense desperation and neediness a mile away, and nothing is more pathetic or unattractive than that.