Out of sight, out of mind, right? 

Göz görmezse gönül katlanır, doğru mu?

No abla, it is the opposite. Gözden ırak olan, gönülden de ırak olur; değil mi?

Ahh! I see you cannot always trust what is written in some dictionaries

click here

Göz görmezse gönül katlanır. If eyes don´t see, heart endures.

I understand this like "Even eyes don´t see, heart still keeps loving and endure the pain". Maybe I am

wrong.

The meaning is not so clear I must admit. This is how TDK explains two similar sayings:

§  göz görmeyince gönül katlanır
 yakınımızda bulunmayanların özlemine, acısına daha kolay dayanabiliriz.
Atasözü

§  göz görür, gönül katlanır
 kişi, sevdiği bir kimsenin uzak yere gitmesi durumunda onunla görüşmekten umudunu keser, ayrılığa katlanır.
Atasözü

Isn´t it like what you can´t see you forget or if you don´t see someone you get used to his absence?

But if you for instance saw her all the time but couldn´t approach her it would be worse wouldn´t it?

Another explanation can be like this: You love someone but she is married with another person. If you saw her everyday it would be very hard for you to endure the pain. But if you didn´t see her often, it could be easier to endure it.

We thought the same thing in the same time