I never lie to get laid--partly due to ethics, partly to keep honest to myself, and partly because I don't need it. At the same time, it's no one's business to know how many girls you've slept with or what the circumstances were! Especially outside a LTR, she doesn't have a right to ask (let alone get an answer) about who you've slept with! Nothing good can come of such information, regardless of your answer. So stay clear of the subject, deflect, tease her about being a nosy, inexperienced little prude.
Whenever I am forced to answer, I relay the following points:
- I am happily/healthily single because I want to be, and that includes sex.
- I love sex and am quite good at it.
- There is nothing wrong with an active sex life (unless you're a catholic priest maybe

)
- I stand by the above three and whoever can't live with it won't work for me.
You'll do well to make that last point implicitly, rather than separately communicating it. Lastly, you made a huge mistake by texting her continuously after she pulled back. Should have told her unapologetically what you're about, take it or leave it, and parted ways.