I played this last year and replay it again my problem is I want to romance the best friend I get a lot of lust points but not romance points anymore it stopped at 10 romance points
Romance now has milestones like first kiss, first date, officially dating, etc. Your romance bar won't fill more until you can unlock those milestones. Try doing the quad party storyline OR showering in the morning to kick off romancing the best friend without progressing the quad party story.