I'm 29 years old and can pull back my foreskin when flaccid to clean my penis so hygiene isn't an issue but when erect, I have never been able to pull my foreskin behind the head of my penis. It literally won't even go past half way. 

I'm currently contemplating a partial circumcision to help with the situation.

Does a partial circumcision leave the frenulum intact? If that's the case and I've never been able to retract the foreskin when erect, am I susceptible to frenulum breve? Am I able to get a partial circumcision and also remove or cut the frenulum?

I like my foreskin and would like to try and keep as much of it as possible however I've tried stretching many times and I just cannot get it to a point that it retracts when erect.