Chatting with a girl by SMS, her reply was short but the modal particles "Oh", "Ah" and "Lulu" were added at the end of the sentence. What happened? Is chatting cold or hot?

Generally speaking, unless a girl is cheerful and loves to use these spoken words, she may have something she likes now, but the expression on her face should tell everything. Two people must be together on the basis of equality. Otherwise there will be a lot of trouble in the future.