I made a huge mistake in breaking up with my boyfriend, what should I do?

Please read... I basically broke up with my boyfriend because i felt like it was more of a friendship than a relationship. He wasn't that effectionate towards me... Showed no emotion... And sometimes he just acted like he didn't care. I lost feelings for him and just wasn't feeling the spark anymore... When i broke up with him he didn't really react much either. But now i feel like I made a huge mistake and I dont know what to do. How do i win him back? Or should i even do that? Please dont be mean about it. I need real advice.
I made a huge mistake in breaking up with my boyfriend, what should I do?
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