I feel you, I have that same anxiety with all my friends. I keep thinking that they'll get annoyed with me and just ignore me altogether. I guess to reduce your anxiety you could ask her to write down why she's friends with you? Cause I don't know about you but I always wonder why my friends want to be friends with me. I don't feel good enough.. So maybe you could read that list every once in a while and maybe that would help? Take care <3<3