Im a bisexual girl and my bisexual friend i want to kiss wat do i do?

so i am a 13 year old bisexual girl and my friend (who is a 16 year old and bisexual) i want 2 kiss her..... shes told me a while ago that she loved me but now im not shure she does... and 2 prove that i love her i was going 2 kiss her...but my thing is... how do i kiss her? when should i do it?... i really do love her but every time i tell her i love her she says "no u dnt" or"i gtg srry bye" plzzz hepl me i need all the help i can get and as quick as possible 2!!!!i want 2 kiss her next time i c her but since my parents nt like her and dnt want me hanging around her we have 2 hide our friend ship so the only time i get 2 c her is at school or if we acidently run into each at a store or something... plzzz help me i wana kiss her