The persona Tyler presents in this song, and many other songs, is quite different from his own. Here he can’t remember the girl he woke up with because of drugs/alcohol, but in reality he doesn’t drink or do drugs (though much of his Odd Future crew has — see Domo Genesis)
Tyler’s raps are generally fantasies — his creative mind running wild. When he gets into character he can be anyone he wants
This is similar to a line in Eminem’s “Drug Ballad”