please help meeee

So I currently live w/my mom & we don't have the open type of relationship to where we can talk about anything.. But bringing friends around is the hardest part cause she don't really show emotions & feelings .. So like w/my boyfriend we hide to do everything.. Even when he comes to get me , he like parks down the street & etc. I been tired of doing it & I've brought him home to meet her before so its not like he's a total stranger but she don't show or say if she approve of someone... What should I do???