How do you stop missing someone who doesn't miss you?

Now, I know this may not apply to everybody here because I guess some of you are actually glad you don't have to deal with the person anymore, but in my case... it's been awful.

I either feel angry because of the pain they've caused me, even to this day, even though from the last time we talked they were so convinced they weren't doing anything... like getting rid of me out of the blue after I told you I'd rather have you in my life even with our arguments than not at all, even with the multiple ways I showed you I needed you in my life... make it make sense. A discard and the silence that ensues can be lethal too. You don't have to actively do something to cause pain 🙃 so when I'm angry, I do what's necessary to keep this mindset because it's easier than having to deal with all the sorrow resulting from this situation.

When I don't manage to stay angry, because I see a post that reminds me of them, or simply because my heart failed me in our friendship and I'm incapable of not thinking fondly of them anymore (I wasn't the "heart" to their "brain" for no reason...), I miss them. And when I miss them, everything feels just as vivid as if it happened yesterday. The good times, the discard... Time passing doesn't feel natural to me because I'm still very much THERE and I'm not exaggerating when I say I'm shocked I wasn't sitting with them at their house just yesterday. As a reminder for those of you who haven't seen my other posts: this is about my best friend. They knew how much I loved them, I mean once they knew about my feelings and we got close enough, I got in this dynamic where I told them things that screamed how much they meant to me. It's clear they knew them leaving would tear me apart and we saw each other again after the discard, I never hid how I was very much NOT okay without them...

Now, I know there isn't a miracle move on drug or a miracle recipe to stop missing people. To make the pain go away. Missing someone is already tough, but missing someone who doesn't miss you back? The pain never ever stops. And you should've seen their reaction when I let them know I missed them post discard. I'm sure you can guess how careless they were about it, I was there pouring my heart out to someone I had trusted with everything, who was now presenting as cocky, selfish and emotionless clone of my best friend. I hate that I'm even here posting about how much I miss them, I can hear their contempt as well as I can hear them telling me not to live for other people, that I shouldn't care so much... this duality of theirs just adds salt to the wound. It's like the day my brain superposes those two entities, I will just. Die.

I'm so glad this sub exists because it provides me with a place to put down how I feel and people to talk to, people who aren't completely oblivious to how it feels... what do you guys think 😔