I'm a little confused about exactly what you're saying is your problem. Are you saying that you cannot ejaculate from regular sex because your foreskin is too tight? If that's the case, you could just stretch out the opening, so that the foreskin can slide all the way back easily--even when you have an erection.
The 6-8 weeks after circumcision of extreme pain and worrying about stitches ripping out doesn't sound fun, but if you have "way too much" sensitivity, you might like the end result of circumcision. It will be much less sensitive as 75% the nerve endings of the penis are actually in the foreskin.