My question is that my penis have not big length and width(girth) because therefore i,m really serious worried about it and my future so tell solution?

I am: afraid there is no real "solution". If everything functions normally then what you consider "big" may not be important. Have your doctor advise you after an exam. There could be a medical issue but it is difficult to tell with what information you have provided.

Focus elsewhere: First off, you should review this with your doctor as some developmental issues can be related to hormonal problems. If that's ruled out, then you should try to avoid focusing on size issues as many women do not focus on this. I know it can be difficult as this is common in men, but please try to work through this. Sometimes a therapist can be very helpful.