Why does he have such an effect on me?

My best friend is distancing himself from me. He's just tired of being friends with me. I haven't been able to stop crying for months.

I try to move on, and I am busy all day. I have other friends. He was just the one that completed me.

When my boyfriend broke up with me, I cried for one night.

But him... I'm dead. Some nights I cry so hard I get a nosebleed.

I love him so much, and it hurts so badly. Last time I felt like this was when a friend of mine died.

I try to give him space, and I collapse after three months. I just miss him. I have been dating, hanging out with other friends, working 50-60 hours a week, and sometimes he's off my mind, but then I get hit so hard later when I have spare time with tears.
Why does he have such an effect on me?
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