What is the best way to end an informal sentence (such as a text or over Facebook chat) with haha?
Consider the following options:
It's always bugged me haha
It's always bugged me haha.
It's always bugged me haha!
It's always bugged me; haha
It's always bugged me; haha.
It's always bugged me; haha!
It's always bugged me. Haha
It's always bugged me. Haha.
It's always bugged me. Haha!
It's always bugged me, haha
It's always bugged me, haha.
It's always bugged me, haha!
All of them which end with an exclamation mark are too loud. All the ones which have punctuation between the 'haha' and the word 'me' have a very broken flow. All of the ones with a period on the end look like it's an excessively boring laugh. The first one without any punctuation doesn't have punctuation and seems incorrect.
My only thought was perhaps 'haha' itself could be considered punctuation. Technically 'haha' is an exclamation.
Update: I added 10-12 based on JeffSahol's answer.