What does mean if a guy says he wants you in his bed?

Answer 1

In general: he wants some kind of sexual activity in the bedroom.

How far that would go is any-ones guess.

Or when said in a conversation it's a rude way of stating that he finds a girl attractive in a sexual manner.

Younger guys sometimes tend to think with their hormones in stead of their brains. And sometimes the hormones also do the talking. They usually grow over it.

Answer 2

It suggests that he is interested in pursuing a physical or intimate relationship with you. It is important to communicate with him openly about your boundaries and intentions to ensure both parties are on the same page.