Either he is very cool with her bisexuality and wanting to be with multiple people at the same time OR he wants her to be with him solely but is reluctant to tell her.
Yea the two of them obviously need a DTR conversation b/c Schultz clearly doesn't want an open relationship
But healthy communication equals no drama, and as far as I've seen from raws, y'all we've gotta wait a bit before we can see our kiddos happy