deepthroat tips

Elleitra
So me and my bf have been together a while now and we still have never done the deed or even blow jobs, although within the next two weeks I for sure want to go down on him... Only problem is when he was out of town and we were sexting I talked a big game about how I dont really have a gag reflex and have blown a few guys before him and that they all said I was great (that last part was true, but going mid shaft and deep throat are a few different things...) he hasn't measured himself in a while, but he for sure knows he's over 7 inches. I recently read an article saying how to find out if your gag reflex is sensitive or not by letting a banana touch the back of your throats and seeing what that did to your gagging reflex is turns out I have a very sensitive gag reflex, I'm working on desensitizing it but that might take a while and I'm scared I won't be ready in time. He really won't care if I do or don't deepthroat him as long as we're together we'll both be happy, but I really want to do this for him and myself especially since he is the sweetest and most kind and caring soul I know... So do you ladies have any tips on how to fully deepthroat a huge dick without choking? Or the easiest and quickest ways of desensitizing your throat?