Playing hard to get or not interested?
I met a girl online and we got talking and found we had loads in common and got on really well. We'd email each other every 1-2 days, sometimes she'd even email me twice in one day, really early in the morning or late at night, she seemed really keen. After this had been going on for a while we decided to meet up and we had a really long date one evening, it was a bit crazy at times but she seemed to enjoy it.
Ever since her interest seems to have dropped right off. If I email her, it takes her a few days to email back. If I send her a text, she'll text back a day later. She says she's been busy the past couple of weeks since the date so I decided to call her to try and arrange to do something else. She sounded quite positive on the phone (apart from seeming to contradict herself about why she wasn't available on a day she said she was) and said she had to go away for work for a few days but would let me know the day after when she was free next (I need a bit of advance notice as we don't live in the same city). A day later and I've heard nothing.
My question is this - is this normal behaviour for a girl, playing hard to get, wanting to be chased etc? If she really wasn't interested she could just tell me (via email or text even, I'd be disappointed but I'd understand), the only other explanation I can think of is maybe she's seeing other people and keeping me as a back up option? Thoughts please, guys and girls.