Huh. A visual novel where there's only a single heroine, eh?
Can't you narrow it down to a visual novel that only has one heroine fall in love with you per route?
If that's the case, then it would be much easier.
Based on your statements, your problem is that you can't get someone that wants you because you want someone else, right?
Then why not read something that satisfies all the girls that want you then?
Yes. A harem game.
Go play Alicesoft games. Guehehehe.