I am sorry to hear you are feeling such pain. I think therapy would be very beneficial for you, if you are not already in it. Unfortunately your thinking is very much black and white, which can lead to feelings of great pain. In most relationships when they end, it is a two way street and there are reasons from both sides on why it is ending. It is almost never just one person's "fault". So try not to beat yourself up about these past "failed" relationships. I am putting that word in quotes because I'm not even sure it's the best word to use.

This quote: "What do I have to do to stop people taking what is mine?", concerns me a bit. Everyone deserves happiness, just as much as you. Yet you seem to think you are having something stolen from you. That is not the case. There is nothing you can do to stop people from being happy and living their lives, and to do so would be not nice at all.

I would encourage you to focus on yourself and getting help before trying another relationship, because it seems that your personality traits are playing a big role in pushing partners away. If you are not able to see a therapist for some reason, there are self-help courses online for DBT that may be very helpful. Find happiness and stability within yourself, then consider dating again.