TW: self harm

I've had this depression for years and self harm always manifested in me in "silent" ways like not letting myself sleep, eat or go to the bathroom, i live alone so no one noticed since i didn't do it when someone was over.
This time i had a very very bad crisis and i cut my wrists, not deep because i didn't have the tools to do it as i wanted to (and i have to recognize i was a bit disappointed), i did it just a few times and in a way i could cover it with a band aid and if someone asked i'd tell them i burnt myself with the oven. 
I have a friend that i've known for almost 10 years and she always comes over. Once I forgot to put the band aid before bed and she clearly saw the cuts but said nothing, i just covered myself in a natural way and got over it. I kinda had this wish that someone would see and tell me to stop, or feel like someone cared, i know that's not okay but it's the truth.
Instead, after like half an hour my friend started talking about how she used to want to harm herself when she had to take a specific medicine. I know it sounds like it's not a bad conversation but that made it clear to me that she had seen the cuts. Because she always does this one upping every experience and making terrible situations something to compete over. Instead of listening and conforting, she does this. And i know how she is, i still love her because i kinda get where that behavior is coming from but this time it felt different.
She actually saw that i was cutting myself and preferred to turn it on herself and ignoring instead of getting worried, i got hurt in my heart. If i saw a friend was hurting themselves i would try my best to talk about it the right way and offer some help. As i've done for her in many situations before, not for self harm because i've never seen her do that, but other things.
Should i even expect someone to care at this point? Should i still be friends with her?
I got so sad that i couldn't stop thinking about this and had to come write it here.
Any thoughts are welcome.

PD: My pronouns are they/them and so you don't worry about the cuts, I'm now on meds and therapy and even if i wanted to cut myself i don't have the tools to do a really dangerous cut. I'm trying my best to be stable and not do it anyways.