I need help to leave this mentally abusive relationship

He is abusive...and I need help to leave:( I am 30 and "engaged" we have been together off and on for over 3 years. After seeing my parents who I had not seen in 6 months the signs started to come together about the abuse (no contact with friends or family, breaking into my email/facebook accounts, limiting my activities, belittling me, commenting on what is appropriate to wear, breaking my cell phone, making me change my phone number several times, choking me, telling where I am allowed to go, questioning if I was unfaithful, terrible moods from him all the time, telling me where I can work, telling me not to go back to college, not wanting me to have my own car, making me get rid of my dog and cat, giving up my own apartment but not giving me keys after I moved into his and not allowing me to use this as my address)...literally I could go on and on.

So now what? We have split many times due to either his drug use or his lack of respect by contacting his ex-girlfriend when I mention how disrespected I felt, and every time it it is the same senerio-he threatens me and tells me just to leave without so much as letting me grab clothes or a toothbrush. I have a lot of stuff I want and worked hard for. He also told me that he would not allow anyone that I chose in to grab my belongings, which makes it impossible for me to get them because I cant carry furniture alone. I did manage to make a set of keys because I knew I may need them for this reason.

I am scared to leave him because of some of the horrible things he has mentioned to do to me if I do. He also has some illegal hobbies which when I mentioned once that I could have a police escort to move out made him extremely angry and very threatening. I have my parents that suggest I move to their house but I dont know how to formulate a plan to get from A to B. He does not work so there are few and far between opportunities to move out when he is not there. I know that having to have my stuff sounds petty, but I worked hard for those things and they remind my of where I was in life before all of this. Letting him win for his demands even in leaving him is like he still won...so I refuse. I need help. Please.

Lost Lady