Missing the big O

I need some advice please! I've been dating my boyfriend for 2 years now and he's never given me an orgasm. I'm self conscious about cunniligus because I don't taste nice and he hasn't really tried anything to make me orgasm. His excuse is that "you always seem uncomfortable!"  We were both pretty new to sex and we've improved heaps but I feel like I'm missing out on the connection you feel when someone makes you orgasm.  Besides drinking litres of pineapple juice, what can I do to help me have an orgasm with him?