I think the person is having 'trouble sleeping' is that his girlfriend or whatever are having trouble and are breaking up. 'your jumping in my bed' could mean the thought of that other person or there argument is 'jumping in his bed.' and he 'sure could use the rest' because it's been bothering him and he wants it to leave, or for them to settle the problem.
"It’s you
Why’s it always you
and never me?"
most likely means what [girl] said, they used the line 'it's not me it's you' and he's wondering why he's never the problem it's always the other person.
I think the person is having 'trouble sleeping' is that his girlfriend or whatever are having trouble and are breaking up. 'your jumping in my bed' could mean the thought of that other person or there argument is 'jumping in his bed.' and he 'sure could use the rest' because it's been bothering him and he wants it to leave, or for them to settle the problem. "It’s you Why’s it always you and never me?" most likely means what [girl] said, they used the line 'it's not me it's you' and he's wondering why he's never the problem it's always the other person.