I do know "betrayal" is not a noun. Because of that I do not know if I have to use articles with abstract words. So, if wanna say: It is betrayal or a betrayal
Sorry, but "betrayal" is indeed a noun - and usually a countable one at that. So yes, you need an article in most cases.
In the other hand, there's no such English word as "wanna." It's only written when one wants to demonstrate the lack of enunciation by a speaker .... or by somebody who cannot write proper English.