Whats the meaning of this shakespear quote?

Question

I love thee, I love but thee

With a love that shall not die

Till the sun grows cold

And the stars grow old.

~ by Willam Shakespeare ~

i dot understand the i love but theee bit,, so is it love or not?

Answer 1

I think in this passage of Shakespeare's, the phrase "but thee" means "only thee."

So the quote is saying

I love thee, I love [only[ thee

With a love that shall not die ...

etc.

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BTW:  What part of Shakespeare's work is this quote from?  I hadn't heard it before.  

When I lsearch for the first two lines on Yahoo, I find this quote attributed to Bayard Taylor and also to the German writer Herman Hesse.  But I don't find any sites linking it to Shakespeare, not in the first Yahoo page I get.

Are you sure the words are from Shakespeare?

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PS -- On definitions.  The word  "but" in older English literature also is used at times to mean "except" or "except for."  

Examples:  

"No one but he could have done it ..."

"I love no one but thee ..."

Answer 2

This to emphasize that not only doe he love you, but he loves ONLY you

Answer 3

"I love but thee" means "I love only you".