I mean, the MC is a freshman on a college campus. Logic says that other guys will steal at least one girl he's chasing.
Curious that in regards the main girls, there is things about them that justify not have other guys besides MC pursuing them if you think, except for Tybalt pursuing Jill which was never mean to be a real danger to MC.
Josy and Maya are in a secret relationship.
Sage is the HOT president and girlfriend of the Alpha's president, in the college hierarchy this demotive any onther guy to even try
Isabella is a teacher, has his temper who make her be called "ice queen" and her issues with her husband, again anyone who tried is set ti fail.
Talking about realism, MC will never get any chance with any of them. But since he is THE MC, his role is be the guy who get the girls that anyone else see as unreachable.