I don’t wanna do this again

I feel like I don’t want to do it ever again. I don’t wanna meet someone, I don’t wanna tell my favourite colours, my favourite music genre, about my interests etc. I miss her. It was a long “friends to lovers” story, and…I just can’t. Part of me knows that I will eventually move one and probably meet someone else, but another part just tired. I’m don’t wanna put my effort to anyone else anymore. Is this a common thing?

UPD. I don’t hate her. She’s a great person. It’s me who did a mistake. I’m an anxious person, and it ruined some good moments for us. I hate it. I hate myself.