Can you please translate for me?! Thank you so much!!!

"guzel kiz"
"gunes kalbim"
and what is "hayirli olsum"?

guzel kiz = beautiful girl
gunes kalbim = sun of my heart (I think I may be wrong here)
hayirli olsun = good luck to it

Thank you!

i realized ahhh my mistake it is "hayirli olsum"? does this make a difference?

I am not sure how good luck to it would apply?

If the context helps, i was explaining to the one i love about a very special moment. This is what he said in response.

Do you understand this??