<human>: Can you succinctly summarize the text in 1-3 sentences?

Hi this is my first post here and sorry if my english is bad (not first language).

There is a girl that I like. We went on a few dates and we really hit it off. We haven't done anything sexual (sex, etc.) yet. I am really interested in her (she appear to also be interested). 

I have asked her if she wanted to make it official that were a couple/dating. Her answer was No. The reason she gave me was that she's to focus on her career and that having a boyfriend is too much of a burden. But she was ok with have a casual thing but without sexual contact (Sex/BJ/anything) except kissing and cuddling.

Now I am confused I don't know how to respond to her proposal. 
Does her proposition mean that she doesn't see me as long term thing? His she one of those type of guarded of women? Is there more meaning to this proposition (bad decisions/actions from her past or something else)? Do women actually have this types of casual relationships? Is this a type of red flag?

So I am seeking some advice and someone's experience if they have been in this type of situation.
<bot>: A the girl I am dating want a casual relationships that has no type of sexual contact (Sex/BJ/anything) and I confused and don't know if she´s just testing me or there is more to her proposal?