Is it normal sometimes i do this

Sometimes like tonight I write a post on the local app which is anonymous about missing my best friend whom I havent had contact with in a few years. Since he doesnt use social media I dont know if hes on there but I wish it and sometimes ive gotten DM, someone recognizes my situation so they wanna know who I am. But its never him. And since hes moved away now I dont know why I still do it sometimes. He wont be on our citys local board anymore unless he has home location saved so he can access it from anywhere.
I mostly feel accepting that hes not in my life anymore and I dont mind or miss him. But at the same time its a hole in my heart. I was dumb and thought we'd always forever be in each others lives. We talked about the future and even though we wanted different things, hes always wanted to leave it felt like we'd always be in each others lives.
I wish very much that sometime he sees a post I make and feel hit by it. And even though hes not sentimental he contacts me.
I keep having this hope within me.
Its not often I make posts but sometimes now and then.
Some say I am stuck with the past.
But its just ive never had a friendship which felt more real and equal.
I feel like a large piece is missing from my life.
Even a part of myself that he brought out in me that I liked.