<human>: I recently started dating a friend of a friend who is a year younger than me. She has a reputation for being a bit flaky and moody, but has been nothing of the sort with me. I genuinely enjoy spending time with her, and there is no shortage of physical contact/ physical flirting and making out/ petting during our dates. 

We live in Dubai, and both live with our parents to save money. I'm making around USD 70k per annum but am saving up for a business I want to start. She's earning around $40k but is living with her parents to save cash.

We're both relatively experienced with sex, and I once suggested we rent out a hotel room and spend the night there in the middle of some heavy petting (not for that night but for later). It wouldn't work that night as she was on her period, but I said sure let's plan for later. 

She sounded.... ok about it. Not excited or anything. Since then she has hinted that she wants to take it super slow with me. I'm not sure if this is a "he's special and I want to make this a long term" thing or "I'm not that attracted to him" thing.

I am a relatively decent looking guy but am in great shape; my recent drive for fitness has increased my sex drive incredibly. I'm funny, get along with her friends (and vice versa). I am very frustrated. I wanted to know if anyone else had this experience?

Can you summarize the given text in a few sentences?
<bot>: Why is it that some girls hold back on sex? Is it low sex drive? Lack of attraction? Holding out to develop the relationship? All of the above?