want some advice

Relationship Help

So there is a girl who I have a big crush on and I want her to be my gf I have a big feeling that she has crush on me too becose one day she took out a page from my notebook and wrote our names with a love sign in between and recently I made a new Snapchat account (she was not on any social media) but when I followed some of her friends the next day she made a new account and asked me to follow her she even flirts with me alot like once she said I love you but I took it as a joke so should I ask her out and we also have a talk daily and I am really feared of rejection and it might spoil my name

Plz helpp