I don't want to sound rude, but I believe that if it's a relationship based on 'fooling around' (friends with benefits = sex?) then there isn't much passionate romance anyway. Perhaps she's on her period, perhaps she's just shallow and only dates guys for sex. But really, if she says "I feel new emotions I don't know about" regardless of whether you're an aspie or not, there's no way you can understand a vague, mysterious, description like that. Regardless of whether you fooled around or not, keep in mind the relationship was only one month long. The first months are usually spent gauging each other. It took three months for my girlfriend and I to just kiss! If it doesn't work out, don't blame yourself for some "new emotion" that suddenly overtook her.