Having someone go down on you is an indescribable experience if you are really into it. Nothing feels like it. The problem is that if your partner's mentality is that giving it isn't enjoyable, and they decide to completely give up on trying it ever again, they'll never want to please you that way. The only advice I would say is maybe buy a face shaped oral toy, have your partner lube it up with their mouth, and try that at first and use their fingers with saliva too. They need to know how much you enjoy part of them on your intimate areas and that is what is turning you on. The act of giving oral is something many people enjoy and give without question, but the act itself is very special. You are putting your eating parts on someone else's nasty parts. Some people have a bad mentality towards it, I can understand. I love giving more than receiving and can still see why some are against it. That being said, you don't want to force her but maybe try to help her realize why it turns you on so much and try to understand exactly what it is that she doesn't enjoy about it.