Should I stay with her or broke up with her? Plz help.?

There is a girl whom i meet on valentines day in the super market. I am a bachelor an i live alone. So one day i invited her in my home and we hugged and kissed each other for many times. She told me that we will have everything like boyfrnd and grlfnd but we will cal this relationship as only frnds. She said that she loves me and dont want to lose me by any means. But sometimes she behave strangely as she didnt pck up the phone for two or three times.It happened several times. Now i tried to broke up with her but she said that she will nvr do it again and she is really sory for what she has done. Now wat will I do? should i stay with her or broke up with her?