תרגום - טורקית-אנגלית - Sende hiçbir ÅŸeye üzülme çünkü seni çok seviyorum...

You don't need to be sorry about anything either; I love you very much, my love.

sad or sorry

I agree with kafetzou. (for nothing --> boÅŸuna)

Don't know what kind of difference "be sad" and "be sorry" have.

be sad = in general
be sorry = because of something specific, usually done by the person him/herself.