please translate the phrase from Czech to english : Libam te a bud opatr na

More  exactly 

   'I am kissing you and be careful' 

 (difference between 'to kiss' = líbat  and 
                     'to give a kiss' = políbit

 is in the perfect/imperfect mode (finished / continuing)  process  

or (as this is apparently last line of a letter) more idiomatically

  Kisses, and take care

 Thank you for Your question.

It means: " I kiss you and be careful!" 

I asked the question on this forum:
http://www.myczechrepublic.com/boards/index.php in "Vocabulary & Translation Help"

I hope this answers your question.. 
(juste sorry someone else will get the credit for my answer)

You can also say thanks ;-) it doesn't kill.