Will I be forgotten in 10 billion years ?

Not by God, you won't.

Not by me . I do & will always need your companionship

I forgot you already. Who are you?

Far, far sooner.  :)

The stank of your shatty thong will be remembered by humanity for many more years than 10 billion, Pope Mobile.

Yes.  Honestly, it will take a lot less than that.  A thousand years is likely enough, no matter what you do.  A century probably, unless you have lots of kids, lots of grandkids, and make a significant impression on them, especially one that keeps giving.  Otherwise, the best rule of thumb is that when the last person who directly remembers you dies, you're forgotten.  

Yes, if not sooner.

--

Regards,

John Popelish

I'm sure it won't take that long...

 very very certainly

10 billion? Try 100 years.