Been missin' you crazy
To miss a lot; have been missing you like crazy, or i have been missing you a lot.
to a friend you haven't seen in a long tome: I haven't seen you in forever, i've been missin' you crazy!
or
it's been about a year now, ain't seen or heard from you, been missin' you crazy
or
it's been about a year now, ain't seen or heard from you, been missin' you crazy