@jasperinf,
Dates were fun - check.
Dates were exciting - check
She looked forward to seeing me - check
She was cute _ I wasn't I need more time to get into the relationship thingy
We had sex on the second date (oh oh)
She was a friend/sexual partner/ lover
BUT one day she came out and said she wanted to be single and get to know someone a little bit more before a relationship developed. Things have gone too fast.
Who instigated the relationship from dating you ?
"We were exclusive to each other without the label for the entire time".
What I am guessing is that you instigated the exclusiveness whilst only dating, she probably thought that was "cute"... But, then you asked her to be your girlfriend after 6 weeks, she said yes but then sat back and said "whoa" to soon, I'm enjoying the company, chemistry but I don't know this guy way to fast.
You're also not telling us from the day you made it a relationship whether you put restrictions on that relationship, ie) be home when I call, or I don't like you going out or where have you been today.
If none of that occurred, do you even know whether or not she had a previous relationship and it didn't work and was recent as in the break-up and she's not therefore ready for a relationship yet?
She wanted to be friends. Deal with it, be a friend. Who knows what the future holds who knows why she isn't ready for a relationship or whether she saw something in you that reminded her of a past situation that scared her.
Worse scenario you have a new friend.
We don't necessarily date and automatically fall in love. I have a feeling you pushed things quickly and that is what scared her.