Ex OR New Guy?

So, I'm thinking that I'm in a situation that I cannot solve. I think I have made my decision; but, it's kind of hard to come by within my head. Yesterday, my ex Dylan (yes, he is being spoken of again) texted me and had told me that he was sorry for everything that he had put me through, how he had been an asshole and seemed like he didn't care. After I had broken up with him the last time, I had found out that a couple of days later he began dating his ex, Keisha again. Did it bother me? No. I broke up with him and I was done with all the problems and the hatred that got started. Now, he has made me feel like I should make that decision once again to be with him; but, I think that I don't want to go down that road again. I want to be able to feel like I'm loved and feel like everything is going to be different. He has said, he's different; but, I'm just worried that it will go down the same road...Although, now I am talking to this guy that lives right down the road from me. His name is Jim and I really like talking to him so far. I've talked to him many times on Facebook, Myyearbook and Plenty of Fish. I had never knew that he existed, then finding out that he is the cousin of a guy (name not to revealed)  that I've been getting involved with. 
I think I want to make the decision of talking to Jim. I think it's worth a shot with him...I have never dated him and I've never interacted with him in a way of being like that, so maybe it's all worth a shot.
I really wish there was a way to just get Dylan out of my mind and life..We broke up back in April, then don't speak for four months, then I begin dating him again in August, then I break up with him September..and He ends up dating his ex, Keisha and proposing to her, then all of a sudden he wants back in my life? Makes no sense. It's like he cannot be happy for one person and then makes his own decisions that I'd go back with him after all of the pain.