What should I do the girl that I like hates me And it's all my fault?

It all st rated last year I met a girl name rose and she seem nice. Later on I felt in love and I have dated 6 girls but it never lasted because I always dumb them -/- well it turn out that when I alway ask her she rejected me 0.o but then I strarted talking to her more and more and she accepted my request of me and her dating. But then I was texting my ex just to make her jelouse about the good new just then she say wanna go out I'm like you are joking she say no then I told Her okie and I text rose and she call me a and she said she was sarcastic about the going out thing and she erase me from fb....... I Perfect stupid o well no 1 is perfetc ...well she doesn't talk to me for like 5month but I c her staring at me So what do you think I shall do to become friends with her