Saying "I have to go" in chat Today I was chatting online with a Chinese person. I wanted to say "I have to go" to end the conversation and disconnect, so I wrote this: 


  我得走了


but I don't know if there is a better sentence. Or that sentence is just fine?
This is just fine, and it's a very native usage. :)

「得」 has the meaning of 'must' when read as 'dei3' in pinyin or 'ㄉㄟ ˇ' in zhuyin.

For expressing this, you could also say:


  
  我不得(note: 'de2', not 'dei3')不走了。
  我必須走了。
  


But '我得走了' is better in speaking and the above two are more used in writing.