my only idea is you add a number system for relationship levels, just seems like it'd make more sense so you can compare them with others. when you meet Alex you're relatively close with Dalia yet they're on the same heart level so numbers would be better for comparison and knowing if you made the right choices or not
oh other than that amazingly made game, my favourite part is its honestly pretty funny which i always have to love in a game, its a good balance of serious content to humour and obviously sexual content too