We’re both missing out

So my man and I have been together for 2 years now. We have a kid together too so we are more than comfortable with each other but in all the time we’ve been together he’s only gone down on me maaaybe once. He seems to have no interest at all in it and he won’t even finger me or rub at all. I’ve given him so many bjs and everything he wants. I have no idea how to get him to do it for me. Every time I’ve tried to slightly bring it up he changes the subject... HELP A DESPERATE GIRL OUT!