5 years never had an orgasm! help!

I've been when with boyfriend for 5 years. We love each other very much and plan on spending our lives together. Now the problem I am having is I've never had an orgasm from my "G" spot. ( I think I'm saying that right lol) I don't know if there is something wrong with me.  I don't even know where my G spot is located. Now my boyfriends always eats me out after or before we have sex because that's the only way I can finish. I read up on stuff about girls having an orgasm from having normal sex... not oral. That's the normal sex orgasm feels 10x better. I don't know what to do so I can have an orgasm from vaginal sex. Should I buy a dildo so I can practice on reaching my G spot? But I also don't want to hurt my boyfriends feelings... I don't want him to think he isn't pleasuring me. Because that's not the case at all. Our sex life is great! I just don't know why I never had a vaginal orgasm. Would it be wrong if I went to and buy a dildo so I can find my "G" spot? Please somebody help meeee!!