I regularly forget my friends’ and relatives’ birthdays. I spend weeks thinking about it, reminding myself every day that it’s coming up, setting phone reminders etc and even buying the card, then I quite often fall at the final hurdle when I forget to post it, get distracted by something (usually work related) and forget to send a text etc.
It even happens with my own DCs, at the start of the month I have to prepare myself and work really hard at remembering the day is coming up, constantly checking the date and how long I have left to buy/plan etc (which with one of them on 30th is quite a feat for me!)
I suspect I have ADHD but am hesitant to pursue a formal diagnosis. It would explain this phenomenon among others, where I’m so hyper focused on something but then it goes completely out my mind. And I don’t think having an official reason/excuse would help if people just think I’m self absorbed. I’m lucky to have friends who completely understand and forgive my crapness, still sending me and my DCs a card every year.
All of this to say, this isn’t a reflection of how much they care about you or whether they’re a good friend. I appreciate that it feels like that. But from the other side of the situation I can assure you that my memory is in no way linked to how much I like someone. Similarly asking how someone is on the phone. I once had a friend accuse me of never asking. I had never HAD TO ask as she told me everything about her life, her mum, her kids etc so there wasn’t really anything to ask. Maybe you’re asking your friend how she is and telling her about yourself and not leaving space for her to show an interest in you?
Either way, if she’s otherwise someone who you enjoy spending time with by all means do. If you find her annoying for several reasons you can cool off the friendship, but don’t jump to conclusions about her motivations.