Horary charts draw the outline of the matter, not the details.
I would say that if his feelings are not that favorable toward you as illustrated by his/Jup's reception to Merc/you, and his significator is in the house of his family [4th from the 7th or the radical 10th], then he may be adversely influenced by family? I really can't see any more than that.
Yes, it's true that his decision about marrying me is influenced by his family decision.
Means he wants to marry me if his family is ready for this.