Need little HELP thankssss

So there is a girl actually she is my cousin and I like her she lives in another city about 1 to 2 years ago we used to talk every time but know we hardly chat one time in two to three days she never had a boyfriend ever she avoids that thing we share almost everything with each other she doesn't know that I like her we are friends more than cousins but after all we are cousins I dont know what to do one thing more about 7 or 8 months back we stopped talking to each other but now almost every time she starts a conversation because I'm showing her that I am ignoring her coz earlier every time I start the conversation and she kind of ignored me that time I don't know how to express her sorry for my bad English thank you