I'm les but she is not les. Shs is older than for 9years

I'm les but she is not les. Shs is older than mw for 9years. I'm afriad one day she will love back man. I feel very insecurtiy,cause I really love her so much.
But she got bad temple,which make me feel uncomfortable.
What can I do to stay with me for longer time? please teach me.
we've got many misunderstanding, which always make us argue.
some time a jsut say a littel thing like: last time she suddenly cut off the
phone. And I send a message "Are u crazy? why didin't you don't hear to my words first?" Her reply is that if I keep chatting on the phone, we will still continue to argue.
ok, I understand, but at least you should answer to my phone. she switchh off the phone..ah......I don't wanna she think that I'm childish. pleaase help me! thank you