it is a long time
so happy join in italki again , it is a long time not been here
so happy join in italki again , it is a long time not been here
You need to watch sentence structure, punctuation, capitalization, and negation usage. Here is a rewrite of your what you wrote:
It has been a long time! I am so happy to rejoin the italki community. It has been a long time since I last visited italki.
There may be some quibble about "visiting" but I will defend my use of the metaphor.
