It's kind of hard to lay out what the routes are in the game without spoiling everything. The main plot has three different endings, but those don't necessarily have anything to do with who you get into a relationship with. For romance options, Jasmine doesn't have any available as of the latest version (1.3.1) but Cynthia has two different ones. You can make friends with other characters but Jasmine and Cynthia are the focus here.