It means 'I miss you lots' :)
I miss you loads in Welsh is "Rwy'n dy golli di llawer!"
Goodbye! I will miss you!" in Welsh is "Hwyl fawr! Byddaf yn dy golli di!"
It means: Good bye*, Willie (Will). I will miss you. *The "Good bye" is used with someone familiar or close, rather than formally. Hope this helps!
If you mean 6 dots and 1 dash or di-di-di-di-di-di-dah, it is not a valid Morse code character. If there are character spaces that you did not mention in there, there are several possibilities that it could mean.
di amore
In italian, generally, di means of.
"Di" means two.
Mwen di ou awa,mwen di ou awa,
two
Gua ai di means "i love you" in mandarin
Conta means bead, and di ojo, means of eye.
The expression is "Dinky Di" and it means honest, straight, No kidding.