I miss you VS I've missed you

I miss you /I've missed you : feel sad because s.o. you love is not with you.

I miss you suggests you feel it at this moment in time.
 
I've missed you suggests you have felt it in the recent past and continue to feel it at this moment in time.

That is what i learnt today and ............i don't know how to feel about that


I miss you so much