how do i tell a close *ish* friend that i dont want to be friends anymore?
Nobody tells someone 'hey, we cant be friends anymore'.. If you don't want to talk to them anymore then do just that .. don't talk to them anymore, they will get the hint.
When breaking a friendship, you should call the involved person in a private comfortable place and breakdown the news politely. Appreciate the good times you had together and explain why you cant be friends anymore.
Tell them that it is difficult to be friends in some ways and easier to be friends in other ways, so break it to them quietly and slowly