I feel so hurt by an ex, please help?

This is a summary of the points that have happened over the last years with this guy. I'm sorry, I hope it makes sense. I broke up with him years ago, he said he'd wait for me but a couple months later I find he's back with an ex girl. Through that relationship initially finding out about it, he'd allude to me that he missed me through messages & I reject his advances.
I saw him in person for his bday & he kissed me, I got mad & asked him, why he did that, then he replied with "What do you want me to do?" as if saying I should tell him that I want him to break up w his then gf but I couldn't do that, its not fair. He should be making that decision on his own I stayed quiet.
We've kept vague contact since & we did have a chance to get back when they broke up but he was reluctant to, saying he wasn't "ready". Then he gets another gf, again, tried to get me to bed one time while in that relationship & I told him I couldn't as long as anyone of us were in a relationship, then he replied in a very firm tone, almost resentful that that was sure not going to happen (him breaking up) so it would just have to remain a fantasy.
Then a few months ago we were talking after a very long time, it got a bit sexual in nature, I assumed then he was single & he accidentally admits he's still w his gf, I get upset, then he suddenly becomes grateful to me for being the rational one. A little later I tell him I wanted him & this was wrong. He replied w "Like how?" meaning in what way did I want him and I said sexually, I got the sense that he was trying to get me to admit I had feelings for him & after that, he said he wished he could make it happen but he cant, tells me if he could he would sleep w me & that If he could he'd want to do that everyday w me.
Shortly after that, I got into a fit w him, & was pretty upset, I told him this was enough, and its not fair to anyone what he's doing etc. later on when things cooled off, I emailed him & he tells me that I was right about what I said. I told him we couldn't talk anymore, maybe sometime in the long future if we run into one another but that's all. He never responded & I did apologize for being so blunt & angry but he just seemed uninterested in what I had to say.
Then I thought about it and went on a limb and asked him if this all meant anything, all the past things that happened and that maybe we should talk in person. He replied and clearly taken off guard by it, even asking if I was okay. And he went on to say that if I was referring to him and I, that he was flattered but he didn't feel the same way and it was then he told me of the news that he had just recently gotten engaged w his gf and in a very spiteful kind of way, said his full love, devotion is for his now fiancé, that he hopes I find "peace" and he's sure there's another man out there that will draw my attention, and said goodbye.
I was so shocked by the news and hurt and most of all by the way he said it, like I was at fault for everything, like he was ridding of trash. And I just I actually cared about him as a person all this time. Since I wrote the above post and because of the fact that he is engaged to her now, and admittedly because I felt just disillusioned and disgusted by the way he'd been just for the sole purpose of toying around but most importantly, because she deserves to know what she's getting herself into, I emailed him, saying that before I leave this behind, he needed to disclose what happened and if there were anyone else in the picture as well, I told him that he could tell her or I would.
Then I hadn't checked my email in a week now and I come to find that, he emailed back saying that he had told her about me already and stressed he was in it for the right reasons, that what happened between us was mild flirting at best and that he didn't know my intentions and that if I emailed him anymore, he'd take legal actions.
I am beside myself and in utter disbelief. I'm second guessing my position and everything I've done. I thought I was doing the right thing and now this got ugly and beyond anything I could've dreamt up. I don't know what to think anymore. I feel so horribly, I want to cry terribly but nothing comes out.