Have namechanged for this 
I was seeing a bloke for around 6 months, broke up about 6 months ago also. I held back at the time and could be stand offish- I wasn't over my previous ex at the time and had put with through hell with EA and DV. It was too soon. This guy is lovely, and absolutely everything I could want in a relationship, but in hindsight I was too scared of getting hurt at the time.
We broke up because he could tell I wasn't over my horrible ex, and he thought "we'd gone as far as it would go". At the time, he was totally right, but each time I meet up with him lately I realise how good wed be together! I'm also totally over the horrible ex and know it wouldn't hold us back if we were to try again.
What do I do?? Do I just leave it and put it down to experience? Or do I tell him and hope he'll forgive me for not trying hard enough previously??? Seriously, I could kick my prior self!