you also have one flaw there.. if number of relationship points is greater than allowed it will trigger no dialogue. you should add check if number is greater then set it to max. or add greater than.. that's for Andrew.And there are several other students planned for romantic relationships and storylines, with lots of inter-character events such as slumber parties, bar nights, etc. Andrew is the next one planned, as he was cut from the original release because I wanted to spend more time polishing what was already in the game. I want to re-do how I programmed the relationship systems though, making it easier to expand/update, and they're artwork-heavy by their nature, so they're going to take a while to get going properly.
also with Anya you have 2x condition if points >300 and < 400 ( although your comment states that it should be 400-500)