Haha I thought you were my friend for a second because I have the same exact situation but I'm the one who got treated badly and I've been ignoring her for apologies weeks too, but my birthday isn't tomorrow so phewww Tbh your friends reason might be different but for me I didn't do it because I dont care about her anymore it's just that I'm just too overwhelmed to talk to her right now that's the reason why I haven't texted back, maybe give her some time? Who knows she'll probably text back on a random tuesday which I plan to do with my friend, But yeah you should continue giving her something for her birthday! That way you atleast spread the message that you really are sincere.
Question, do you have other friends, apart from her ?
I once had a friend I was very exclusive with, we spent all our time together, but sometimes we disagreed and she wouldn't talk to me form days or weeks. And unlike her, I did not have any other friends that weren't made through her. Then we changed schools, I made other friends, and I realised that friendship doesn't work that way, and it's wrong if the one taking the first step after a fight, giving presents, thinking about bdays and so on, is always the same.
The way you explained makes me think you may (or may not, I don't have the context) be in that situation too.
i don't have many friends at all but that's why the ones i have is pretty close to me. ngl if not for the fact that we're attending college in the same city, we probably wouldn't be this close at all. this is the first time that she ignored me for so long and i'm pretty sure this is it. i feel so weird. i just lost a friend right before my eyes, after all this time we've been hanging out together (/TДT)/

made an honest mistake one day and it seems to be the final straw for my friend (well, ex-friend...). already apologized to her but she didn't reply for weeks now. i feel so bad and guilty and i lwk don't wanna lose her. she may be annoying a lotta times but i also resonates with her the most lotta times. i don't know if trying to mend our relationship will be the right thing to do. feels like it's too late now. it's her bday after tonight and i'm gonna send her money for her present, but idk what i should say as a note. do i ask her to text me back or sum? i really don't know what to do aahh