I will try to be a little more helpful this time. YOu like your boyfriend alot so it is important to try and work through this.
Up until now your boyfriend has been getting away, with getting it all from you without giving it back. He does not have any ditaste of oral sex when he is the reciever. You could try being less giving and coaxing, rather than demanding that he go along with your wishes. As the other person said you do not want to go ahead with marriage until you get this sorted out. It may be that he just needs to acquire a taste for it.
When I met my husband I found oral sex offensive for a short time, but because I did not want to disapoint him I never refused. It did not take long before I was enjoying it. Perhaps this is all your boyfirend needs. I think that part of the problem for me in the beginning was that I found being forced to do something as personal as that, a turn off.Love is not something you force. MY husband has a strong personality.I enjoy recieving oral sex too, so I do understand, IT is very intimate.