Feeling trapped in my relationship

So I am 19 years old and I have been with my partner for almost 4 years. At the beginning everything was wonderful but now I cannot help but feel like I have no other way out of this relationship. My partners struggles wirh alot of past trauma and anxiety and I am always supportive of them, but for the past few years they started showing more aggression, violence in some ways and said alot of heart breaking things that have broken me out of anger for something else. They alqays tell me how sorry they are but the actions are repeated. I had some very bad experiences with my partner to a point where I am now scared. They are supposed to live with me soon and anytime I tried to leave and offer support for their other issues they will not stop ringing me calling me or following me. It came to a point where I had to threaten a restraining order because their behaviour was so bizzare. They are quite dominant and it confuses me because they act so nice to me until they become stressed. Their anger scares me and even with sexual activity and touch I have not done alot because of my fears , but they do not knkw any of these feelings. I do not know how do deal with this as I see my partner almost everyday in my college. My partner dosent want me having friends etc , so I oblige and agree. That is all I am doing. I cannot escape and feel I am being watched by my partner all the time. I dont like speaking or texting them unless they are happy. Does anyone have any advice ?