It's so easy to second guess oneself when things go so very wrong. On one hand it is important to look at ones vulnerabilities, on the other it's important to look at how the other person was behaving and treating you. It does, indeed, take two to tango.
Someone mentioned earlier in this thread to not look at how quickly your ex moved on or how many new relatiinships he has had since as proof that he's ok and you are not but as he's not only moved on not once but twice and the lack of stability there is in question.
Someone else mentioned that sometimes there's a vulnerability about ourselves that is most likely lacking self awareness when victims find themselves in a relationship that is abusive. That was what was in the back of my own mind in asking what was going on in life leading up to this relationship. Part of the recovery process that dv survivors do indeed look at is what was going on upon arrival into this relationship. It's not saying that the victim was looking for the abuse, it's that it's a piece of the puzzle. One of my own points was that I was recently in the beginning stages of grieving the loss of a loved one when I met my exh. There were other things but it's part of the recovery.

You'll get through this. I like that you are going to focus on your passions.