Lump on penis shaft that i've had for nearly 7 years. its the size of a pea and i'm able to grab the lump with both my fingers. it isn't visible and can only be felt when touched. the skin nearly matches my penis skin. is it penile cancer?

No. A lesion that has not grown in 7 years, is not cancer. It is likely to be an epithelial inclusion cyst. Next time you see your doctor ask him/her to examine it and to ascertain if it needs to be removed. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.