How can I lower my cholesterol level quickly?

I’ve never had a problem with high cholesterol but the last time I went for a physical, my number was 235. My doctor said he would suggest a statin if it isn’t down by my next visit in November. Is that really a number to worry about? I don’t want to go on medication. I do feel that I eat quite healthfully with occasional indulgences (that I don’t want to give up.) If I lose 5–10 pounds will that help? (I am about 15–20 pounds overweight.) Is a slice of pizza for lunch 2–3 times a week a problem? I only eat meat about once a month and generally have seafood, fish or veggies/hummus or cheese (sometimes) for my meals. I walk a few times a week and do water aerobics two to four times a week. Any thoughts? Anyone here on a statin?