I need your opinions

I am 28, divorced mother of 3. I have been with my boyfriend for 3 years, but we have known each other since highschool, and had a fling before I married my ex husband. We have a great relationship but he wants a blowjob and to be honest... they are not my thing. Medically my mouth is too small, I've had 7 teeth pulled and to be honest it hurts to keep my mouth open! I have a horrible gag reflex, I can't even eat certain foods because of it.I have tried to explain this to him before but because I have done it to him one time he has this hope that it will happen again. Yes, he goes down on me, but I dont ask him, he just likes doing it. Well, just now we were talking and I said it will probably never happen again. He threw a fit and said if that's true he's leaving. All because he won't get his dick sucked?! Really....there has got to be more to life than making sure you get a blowjob....am I the only one thinking this is childish?