Falling for my best friend

I told my best friend that I like him and he didnt feel the same way. I took it pretty good at first, then it kinda sank in. We argued several times and we haven't talked since may or june-ish... If you want to know more, cause there are more details please message me. Help me out, thanks so much.

Do You mind telling what was the argument about? I dont mind helping I have experience with these types of things(sadly)