URGENT HELP :(

Hi everyone, I really need urgent help right now.I was dating a guy 3 years younger than me but that was never a issue.We were together for 3 years and we broke up because he had to move to another city.We have been apart for 2 years but in this 2 years time he came 2 times next to me and would always text or call me till just las week.We would argue alot and he was always depending on me for everything because I was the one always paying for everything and saving him from his debths.I was his bank account. I had broken it up because he had got violent with me a few times and has even pulled a knife on me and cut my arm.At the time I was scared and he threatened me alot.No one knows.Now that he has moved to another city I found out he has been facing a lady from facebook and has moved next to her.At the time he was still calling and messagging me telling me he cannot live without me I had to be in his life.I told him NO WAY it is over.I found out all about this cheating while he was calling and texting me and told him to be happy with whoever he has.He denied it of course.Now he is trying to get me jealous with females and photos and stuff and saying he tried I was the one that didnt want him? trying to make me bad.I feel so like s*** and low that how could I have been with such a guy and let him do all these things he did to me.I have thought about suicide because it just kills me to think I could have let this guy use me like this.I have prayed to die a few times also because I cannot seem to handle being put into this position.It is my fault I know I should have left him a long time ago, I had but he would come back again wait in front of my door and work.I guess I just needed him since I took him back..Why do I feel like this? Why am I angry he is happy away with someone while I am going through this? I burst out crying alot but it does not help.Just being so stupied to have believed the things he said and put up with him.He is always trying to hurt me in some way I do not know why? maybe because I am in a better financial state than he.He wanted to have her and me at the same time. I really need your advice please help me.Why do I feel the way I do?

he is at fault not you,people use others thats how it is,stay away from him,he is violent.try to focus on positive things,you will forget him

I really am trying too think of positive things but it is so hard thank you very much Kaamını