It’s something worth the while.
It’s something I will miss.
Something I wish to see.
We still talk.
And it’s quite fun.
But I miss looking into your eyes.
And laughing all the time.
Nothing is the same.
When you are away.
I think it’s safe to say.
I’ve missed you more and more each day.
I suspect that in “it’s pretty fun” you may be trying to use “pretty” to mean “quite” or “considerably”. This does not work, because “fun” cannot be a predicate adjective.
Otherwise, all the English looks correct to me.
Would it be OK to say “And it’s great fun”?