Lipirose 5mg. On diet and exercise?

Hello Doctor, I was taking lipirose 5 mg since my cholesterol was high for almost 3 months now. In these 3 months I also followed strict diet and walking at least 45 mins a day. I also reduce some weight and feel healthy now. At this instance can I stop taking statin and focus on diet and exercise instead and keep tracking my cholesterol levels once a month? I'm little worried of the side effects of statin drugs. I also read somewhere that statin usage can one day make you diabetic. Is it so? My dad had a open heart surgery when he was 63. He was diabetic for almost 25 years. I'm 33 now and as of now. I'm not diabetic nor I have BP issues. And for cholesterol also now it's under control with all diet and exercise plus 5mg of statin daily. Is it safe to stop statin, since it's already small dosage and focus on diet and exercise? Kindly advice.