I'm sorry this happened to you.
My father left when I was a few months old. My mum came home one day, and he had taken all his stuff, all the cash, others things that weren't his, and even the bloody sockets on the wall!
A few weeks later, he decided he would come round and see me, but only late at night after he'd been to the pub, so I was asleep. One day he just said that he won't be coming anymore. I haven't seen him since. He often refused to pay child maintenance, and would work for cash in hand etc.
Stupidly I decided to contact him when when I was older. At first he acted all nice, but the moment I shared my own thoughts and feelings, he turned everything back on me. He made out it was my fault and that I should believe everything he said without question, because everything was everyone else's fault except his. He refused to take any responsibility for any of it.
Honestly though, what he did didn't surprise me and it didn't hurt, if that makes sense. I should never had contacted him, that was my mistake. My mum didn't blame me for contacting him, she understood why I wanted to. I, too, blamed myself as a child, despite my mum telling me it wasn't. But now, I know he was the problem and he will never change. Deep down, I think the only reason I contacted him, was because I wanted to know what he was like and his reasoning for doing what he did. I think really, I was actually terrified that I was like him. I am so glad that I am nothing like him.
I did find out that I have four half-siblings (probably will never talk or meet or anything like that) and that he has now been married five times, and divorced five times - not really surprised about that bit though.
Now, I don't feel hurt anymore for what he did. I didn't always feel like that though, it's hard to explain, but it use to hurt knowing that one of the two people who should love me, didn't. I will always hate him for how he treated my mum. Some might ask why I contacted him. It is really hard to explain. I guess I wanted to hear it from him (not that I didn't believe my mum), I wanted to see if he even held a modicum of remorse or even gave a shit. But ultimately he didn't, I'm nothing to him and he is nothing to me. People have even said to me, but he is still your family. My answer is no, he is not, only because we are blood, does not make us family.
Sorry that was long. But ultimately I know realise the best thing he ever did for me was to leave.