One of the worst things I know in games regarding choices and romance in particular is when your MC is locked into a romance from the start, and in order to date someone else your character literally has to cheat on them, or like talk behind their back?
The examples that come to mind are Champion of the Gods (where you only get the chance to date that commander character - I don’t remember their name - at the very end, when either you or they are literally just about to get married to the prince/ss?)
The other one is in The Hero Unmasked where the whole romance was just kind of…off-putting to me personally. To begin with you have to decide whether your character is interested in the person they’re engaged to, and then right away you meet another character and you don’t get a say in the fact that your character is very obviously attracted to them (a thing that wouldn’t have been an issue if it was just…mentioned in passing but it’s more than that. I remember being annoyed that I couldn’t decide how my character felt about this person they just met since I’d just met them as well.) Then you’re given several romance options and even though you can start flirting/kissing/romancing them mid-game, you have no chance (that I found) to break it off with your S/O until the end of the game? I kinda felt like we were being nudged to do it at some points and it ruined some of the gameplay for me, especially since I really liked one of the other romance options while I didn’t feel I knew the mayor enough to care much.
TL;DR: if you’re gonna add multiple romance options please don’t make it sound like the MC has to cheat to unlock other romances.