When will bf stop listening to his mom

Don't get me wrong i love his mom and that they are close but when he asks for my opiniokn and then asks his mom (who i never agree with) and always sides with her it upsets me. I don't care that he asks her but if my opinion is so irrelevant don't bother asking me at all. We have been dating for two years. But is my bf always going to be like this or will he change after we live together?? Anyone have any personal experience??