(TMI) well he isn’t gay

Okay so my bf has never put me in doggy style... really random to me, I thought guys always liked that 🤷🏾‍♀️. If I start like that he goes soft.. he prefers missionary or like from the side... he is crazy large so I’ve wanted to like idk get blown out like that but he is wayyyyyy more interested in missionary and making out during ...

Now I’ve never been in this situation before.. it’s not really a problem I just want to make sure I’m okay for him and like I’m not the only one who has been here. Comments will be read and dissected am I loose? But I thought missionary means I can’t be , was he like molested and is now uncomfortable with the position? How do I ask him? Does he just really only want to make love to me? Will I ever get my back blown out again? I just need to know 🚶‍♀️