I've explained this before on my Tumblr, so if you haven't seen it already, there are no characters you are "forced" to romance. The MC being in love with her is only for the plot. You don't have to romance her if you don't want to. There are two male romances and another female romance available. You can play however you want and decide for yourself how your MC identifies, and if that doesn't work for you, then you don't have to play at all.