Mr J, normally, I'd say "never tell a girl to do one", but bloody hell, fire! Seriously, she really doesn't sound like a nice lass, she's telling you she's deeply in love with because she wants to win you back / make you feel really guilty that you've no longer got the girl who's "deeply in love with you". Also, she's telling you about these sexual encounters to make you feel jealous, which if I'm correct, it hasn't done? (See! It doesn't work for us either, if you lads tell a girl about someone else you shagged, she won't feel jealous!) She called that girl a "slag" because she's the one who's jealous (you split up with her, and so she can't seem to bare you even speaking to another girl). In polite words, just tell her that you're not with her anymore and that she really does need to accept it, because even is she doesn't you're still going to have a life of your own and if she follows you around like a lost sheep you'll pay no attention, and that you really couldn't care who she has and who she hasn't slept with yet. Bluntly tell her that she's nothing in your life anymore, and so anything she does or says means nothing to you. So on and so forth...