I've said it before, and I'll say it again:
The best prediction of the future is the past.
Hi Dawn. When I read your post my blood ran cold and my palms got sweaty. Your scorpio sounds somewhat like mine..........he's a 1st house scorpio sun conjunct scorpio venus and a libra mars in the 12th house. He doesn't use me per se, but I have felt used at times. My aqua sun and scorpio moon doesn't like that feeling at all, but my cancer rising and saturn in 7H has learned that frequently he feels the same about me (I have 8H aqua venus).
I would never do what you did unless I was definitely amputating him or sure that I had a place to run and hide...like the witness protection program. If I ever came back and IF he ever took me back he would punish me until he felt that I learned my lesson. And I mean PUNISH. The thing about scorp/scorp venus, in my humble opinion, is that they will play games but do not tolerate any blowback. And they will know right where to stick the knife wherever it hurts you the most.
I feel the dividing line for scorpio is whether you did something intentionally to them or not. (Even if they deserved it) If purposeful, you will get the payback. Accidently?......you will receive forgiveness but you will have to work for it. AND youll be punished either way.
If it were me in this situation, I'd expect that as soon as I had sex with him again and thought everything was ok and back to normal, Scorp would blithely inform me he is already seeing other people and he now considers us casual friends with benefits....or something along those lines.
So, I think Glenn is right. I also think there is no sign meaner or tougher than scorpio, so your gemini sun, pisces moon doesn't stand a chance. Maybe your sadge rising needs to run for the hills.
Lest I sound too harsh, my scorp is the finest man (and not in the "he's so fine way"......in the "living by your ideals and values" kind of way) I ever met. He is a treasure.
Thank you to all who responded. I guess its foolish of me to think he would change. Good sex makes people stupid I guess lol.
hey shadesofblack I am now seeing ur post thanks for replying with ur experience. Sigh I suppose I should just keep my distance...we are only texting each other now and he is being very insistent and persuasive so he probably has somethig planned. He knows I have strong feelings for him although I insist otherwise and he just laughs.
Welcome, dawn11. 
Good sex makes people stupid I guess lol.
Sex creates oxytocin, a hormone that bonds you to the man you sleep with. Biologically, as a woman, there's nothing you can do to stop this, except stay away from manipulative assholes because you realize on a cognitive level that they mean you no good.