I have tried to translate myself and what I understood was "my sweetheart/my love, how are you, what are you doing? .....I miss you. Its the part in between which I dont understand, I hope someone can correct my translation and help me with the part I didnt understand. Many thanks in advance!

"Canim sevgilim nasilsin, ne yapiyorsun? Aklimdan bir an olsun cikmiyorsun. Özledim seni"

 My try:

Aklimdan bir an olsun cikmiyorsun= You aren´t going out for a while from my mind.

"Canim sevgilim nasilsin, ne yapiyorsun? Aklimdan bir an olsun cikmiyorsun. Özledim seni"

my dear sweetheart how are you what are you doing?you are not goýng from my mýnd even a moment. i missed you so much

That´s one of a few version of how we would say "you´re always on my mind" in Turkish.

¿What are the other versions?

Mmmmmmmmmmmmmmm...I am so curious who is this lucky girl..  

¿Lucky? hehe, you´ll make me blush thanks