<human>: Can you succinctly summarize the text in 1-3 sentences?

Hello /r/relationships. I need some advice. I [M24] recently broke up with my ex about 5 months ago. It was a long term relationship, we spent over 4 years together. 

We wound up breaking up for complicated reasons. Things weren't moving forward and it seemed like we were doing more damage then good to one another. It didn't end in bad terms, we were both devastated that it came to a break up, but we decided to not have any contact anyways. 

Well, here I am 5 months later and i recently started talking to someone new. I've been feeling some insecurity about whether I should be in another relationship but I'm not sure if it's tied to guilt over my break up or if I'm just moving too fast. I don't want to hurt this new person if I'm not ready for this but it's hard to tell at this point given that I've never been in this position (ex was my only gf). 

Any advice on how to know if I'm ready for this? I don't want my old relationship to spill into a potential new one. Any words of advice are appreciated.
<bot>: 1st time getting over a relationship. Not sure if ready or moving to fast and don't want to hurt new girl.