Ashutosh the girl might be very hurt about the downs of the relationship. But if she says that u have destroyed her life or used her as a sex toy then she is not right as relationship is a mutual thing and u both are equally responsible for everything. She is just being too emotional than being reasonal. Dont take her comments too seriously. I would suggest u to once talk to her and try to sort out the difference if u can. U can take the help of a relationship councellor to weigh the benefits and cost of continuing the relationship.