Hello, PangHerHeart - sorry to hear you are having trouble.
Hmm, four romance routes? Well, there are six in total including the secret route, so that sounds like you are missing someone.
But, from the CGs you mentioned (clever way of avoiding spoilers, by the way ^_^) I don't think you are missing any of the romances. Do you want to email me at firstname.lastname@example.org?
I can get some more details from you and we won't have to worry about spoilers ^_^