You lose ounces at the gym. You lose pounds in the kitchen.
Change your diet. Watch
"Sugar, the Bitter Truth".
Look up "slow-carb diet" as well. The gist of it is as follows:
Rule 1: No white, starchy carbs. No bread, pasta, rice, potatoes, or grain.
Rule 2: Eat the same few meals over and over to get used to the diet. Don't bother yourself with learning a bunch of recipes that might stumble you and make you give up. You already eat a relatively small set of foods anyhow.
Rule 3: Don't drink calories. No soda, don't sweeten your tea or coffee. A glass or two of wine in the evening for heart health is fine, though.
Rule 4: Don't eat fruit. Fructose is still sugar.
Rule 5: Have a cheat day. Most people make it Saturday and call it Faturday. Eat whatever you want on your chosen day.
Protein, legumes, and vegetables are your main food sources.
Eggs, Chicken, Fish, Beef, Pork, Lamb, Lentils, Black Beans, Pinto Beans, Red Beans, Soybeans, Spinach, Broccoli, Cauliflower, Sauerkraut, Kimchi, Asparagus, Pea, Green Beans, etc. It's a pretty diverse list when you think about what the diet offers rather than what it eliminates.
You can eat all of that you like and generally still lose weight so long as you avoid the carbs. A quick google will land you thousands of no-carb, low-carb, and slow-carb recipes.
I generally stick to it more days in a week than not but I only go on it full-time, 6 days a week, after a rise in bodyfat like the holidays or a vacation. Then when I'm back down to where I want to be I relax it a little and have some carbs here and there, like a lasagna or pizza for dinner or toast with my breakfast.
Which brings me to another useful tidbit: Try to eat 30grams of protein within 30 minutes of waking up every single day. Whether you go on the low-carb diet or not, just grabbing a meaty, egg-filled breakfast burrito on the way to work every morning might be all you need to lose 10 or 20 lbs over the course of the summer. But if you do combo it with a no-carb diet you can drop more like 10-20lbs per month.