@seashells750,
Hello seashells,
your boyfriend would not get the commission if you weren't part of the
buying process, right? On the other hand, if he did all the legwork, filled out
the purchase agreement forms, etc. etc. then he should be entitled to the
commission. If he's done none of it, just showed up as co-buyer, I would hope
he either shares the commission with you or advances it towards the
purchase.
As ehbeth mentioned already, communication is the essential part in any
relationship, and I suggest you discuss this with your boyfriend. Should he -
after discussing it - feel that he's entitled to the commission for himself only, you should reconsider if you really want to be involved with this person.