Non-Muslim Best Friend Guidance and Boundaries

If a sister had a best friend who was non Muslim and now knows that you can't make a non Muslim your best friend and wants to lower their level their friendship . 2) can she make dua for her protection , guidance . Excessively. 3) keep passwords as her birth date . 4)give gifts to her . (If not , can she give gifts to all her friends and also her ) 5) keep the letters they sent each other from the past , or letters she wrote to her , about how she misses her and how she loves their friendship when they had fights , but never sent . 6)keep the friendship bracelet her friend gived her in past but doens't wear them , just keeps it collected in a box . 6) imagine scenerios , where her friend is a Muslim and they both go to masjid and travel around the world . 7) hug only her friend whenever she sees her , what if she is filled with tenderness whenever she hugs her , should she stop or if she does this to all her friends , would it be fine? 8) making special reservations for her without her knowing . Ex : if she is given opportunity to manage seating for a function in school , and chooses for her friend, a seating she thinks she would like . 9) should she change her seating , if they sit together , but everyone has their groups, so none of them would agree to change . 10) sent only her memes . 11) if she thinks her friend's mental health would be affected and decides to wait for a bit until she is alright and can move on .