The cause of obstruction to urine flow needs to be treated. Catheterisation is a temporary remedy to evacuate the bladder. If you are having prostatic hypertrophy or any stricture in the urethra, then the specific treatment for these things only can give you a permanent relief. If not done till now do a USG of abdomen to assess prostate gland, check PSA level in blood and if needed a cysto urethro scopy to know about the free passage. Then it can be discussed further.