I am sorry for what happened OP, and I agree with pps that you should log your complaint with the website. This man sounds vile. Abusive and controlling, and frankly a bit of a weirdo. 
And of course, what happened is in no way YOUR fault, or down to anything YOU did!
Have to say (though I know this is not really helpful and is just my musings,) that I can't even imagine the sheer horror of having to go out dating again in middle age after 2 or 3 decades with the same person. (not sure if the OP is 45+ or not.)
I am ahem in my mid 50's, and have been with my DH for 35 years, (since we were 19/20,) and it makes me shudder to think of being with anyone else, especially intimately... I'm not gonna lie, we stopped being intimate around 5-7 years ago for various reasons (it's mutual, and we are happy together and affectionate, and have a good giggle together and spend time together and have lots in common,) but I have no desire to have sex again, ever. Not even with him. So no WAY would I be doing it with a stranger.
So if he left, (or died,) there is no way on God's earth that I would be having sex with another man - ever. I wouldn't rule out male company for drinks and meals and daytrips, but would not be having sex. And he would know it would never be on the cards as soon as we met.
How do people DO this? How do they spend many years with someone, and then get to 50-ish and then have sex with someone new? And why do men on these contact sites (who are also around 50,) always want to fuck on the first or second date? I cannot even get my head round meeting someone online and going for a date, let alone shagging someone on the first or second date... Not in my mid FIFTIES. It just makes me feel like 
I wouldn't be having sex again with anyone, so literally cannot get my head around someone of 50-60 meeting someone online, and fucking them almost immediately. 
A man who used to live next to me was 51-52 and divorced, (when he was 40,) and he used to pick women up off websites and in clubs, and bring them home, and you would hear them shagging in the room next door. One time one woman stayed and I saw her in our garden having a ciggie, and I recognised her, she was the wife ex-of an colleague of mine. She was 55. Her face hit the deck when she saw me, and within minutes she had driven off in her car! She was SO embarrassed.
But yeah maybe I am a bit of a freak, but if my husband died, or left me, there is no way in HELL I would be seeking a new man, hooking up with people online, and shagging them within a few days. I just think it's something people 35 and under should be doing, not middle aged and older IMO. In fact, I am pretty sure I would spend the rest of my life alone. 