Would this scenario fall under financial abuse?

I was to received social security disability back pay going back 6 years. It was quite a large amount of money and I had been waiting nearly a year for it to be deposited. As I was waiting my during this time my fiancé (of 20 yrs) and I were having quite a bit of problems with... his honesty, disappearing acts, and, well, just being nice in general! During this time, I found out that the money had come in... 2 and a 1/2 months ago (he makes sure i have NO access to see our account)! Now it's gone!! I've had access to it for 1 1/2 weeks. He apparently purchased a 100 inch TV another fun toys. I've always had a car (very cool ones in fact😆) up until about 5 years ago... mine was repossessed after he failed to pay the electric bill for months and months!. He has an account that is separate than our joint account, that I have no access to. He changed his direct deposit to go into his account and never told me....Yet we have a joint account and that's the one that he purchases everything out of.... So he has his own money...but he's using mine as well. This is the only earning potential I have, and wanted to save the majority of it! Now I'm terrified. He has me where he wants me. Which is at home with no way to leave. And I've been in this situation now for 5 years. If I go out of the house for more than 4-5x a year that's a lot! The tables were turned about 10 years ago, before I was diagnosed with Addison's disease and had scoliosis surgery. I was the only one working, and was working 6 days a week while he was staying home. But now that i stay home. He has this power this power trip and need to control everything!!🤷🏼‍♀️🤦🏼‍♀️ I'm devastated and I don't know what to do next. Any opinions....advice....comments (please be nice, im already falling apart). I'm pretty positive I won't be able to retrieve any money, but apparently because we weren't married (one of my best decisions😉) I was told he shouldn't have touched any of it.