After having sex with her, is it a big deal if I don't want to see that chick again ?

i mean its not like she won't end up having sex again with someone else, i don't seem to understand why they get all 'clingy'.

women can be such a burden on a mans mind, I'm simply too young to be under stressful situations like these.

should I confront her and tell her it was just sex, not a relationship of any sort ?