Was it wrong of me to leave him?

So, I told my best friend of more than 3 years that I needed to distance myself away from him for a while on the phone. I like him more than a friend but he is engaged to his girlfriend. We are both 21. I also told him I have no idea when I will ever contact him. I am depressed and hurt because I rather not ruin his relationship than tell him I really like him. I want him to forget about me.

He called me, but I refused to pick it up. He left a message on the answering machine to please call him and that he loves me like a sister and if he does not hear from me in a week he will try to see me and may have his people search for me! He just kept calling and calling.

I just can't do it anymore people. He is so attached to me, but I am not his girlfriend. Sometimes, I wish I had never met him despite wonderful emotional memories with him. We have very similar tastes and can read each other minds, but I am the one who is always alone. I am the one who is always depressed.

Therefore, I decided to leave him. I cannot continue to cry every night.