short answer - do not use 'wanna'- it sounds awful, it is not an English word, and it makes you sound ill-educated.

Wanna is slang. Correct way is "want to" For example ( I wanna eat something? or Do you wanna go out tonight?) People who use the word wanna are usually between friends otherwise it's considered lazy improper English. Other words similar to wanna are , brang, thang, doin' whatcha

They both mean the same. ''Wanna'' is the abbreviation/slang word, whatever you'd like to call it, for ''Want to''. Some other examples are: ''Got to'' -- ''Gotta'' ''Can not'' -- ''Cannot''

'wanna' is just the sound of 'want to'. It is very informal, so you should only use it with (say) friends, or when texting. You should never use it in formal writing - always write it as 'want to'. Even using it here on italki is not a good idea, as it sounds like whining. Never use 'wanna' if you don't need the 'to'. e.g. 'I wanna an icecream' means 'I want to an icecream' which is completely wrong. For some reason language teachers in China seem to think that it is OK, or cool, so teach it to students, whereas it is not common other than as a transliteration of a spoken sound, or being written by ignorant people.

"want" is used like any other verb and the only difference between "want" and "wanna" is that "wanna" is a colloquial way of saying the phrase "want to." You'll often hear "wanna" when english speakers speak quickly.