Sex?¿

So I’ve been having sex with this dude I like. And he has the biggest penis I’ve ever had and like I’m sore after we have sex. I hate that I can barley take it from behind or at certain angles ughhhh. Is it possible to get used to it? Like is that a thing? Getting used to your partner and being able to take more the longer you stay with them? Bc DAMN lmaooo 😭 somebody help. If not, give me some advice pls.