Ask him directly. Your answer will be there.
Why does my boyfriend (who is employed) want my check?
Unless your boyfriend is a member here, you won't find an answer on this site. Try asking him :)
If you are living with him, you should be paying your share of the rent, utilities, and food bills. Other than that he shouldn't want or need your check. And if you are living with him, just give him a check for your share and keep the rest separate.
No one can answer that question .. But him. He could have any number of reasons to request it .. From being overly controlling to being greedy. Who knows .. Well, I suppose HE would.
"Free Money" ?
The only person you could get the correct answer from is the source itself.... Your boyfriend.