If mean she/he wants you as a girlfriend/boyfriend
He wants to move upstairs.
it means your not putting out enough and he wants to sleep with someone else,
It is a colloquial (slang) reference to his desire to ejaculate on you.
Probably wants a kiss. Or has chapped lips.
it means he wants to have kids
He's weird or sick of you and wants to be able to sleep with other people too.
If your boyfriend says that he wants to have a child but not with you, that just means that he's not ready for that type of a commintment, and if he says that if it happens then it happens that just means that he will be there for you. He will help you through it.
NO WAY, he just wants to sleep
he wants to think if your the right one for him to be with and to think about the relastionship
Basically you need to get over it and make him jealous by getting yourself another boyfriend, who is more reliable and who you can trust.
When your boyfriend says that, its his way of wanting better for you. So he obviously has many feelings towards you if he wants better for you.