On one hand, behaving rudely and self destructively while emotionally distressed is something I really sympathise with. On the other hand, If I was in Hitomi's position, I don't think I'd be able to forgive her so easily. It'd be bad to act that possessive with a partner, and they're not even dating yet. Being jealous that your crush is simply on good terms with a coworker doesn't justify blowing up like that at all.