Just because you have visible abs doesn't mean you have a physique worth posting here.
You have the potential to build a good physique. You need about 40 pounds of MUSCLE though. With the amount you weigh the question of 'if you should bulk or not' almost sounds trollish. Don't worry about clean food or dirty food (whatever that means).
There's no way you'll gain fat even if you eat burgers and fries every day. Start getting half of your cals from carbs and 200 grams of protein per day. Keep upping the calories until you are gaining 2 pounds a week for a while then start adjusting. You can easily carry 195 pounds on your frame before you need to start worrying about clean or dirty foods.
Please go eat something.
You'll get a rating after you post the proper amount of pics, but I have a feeling you aren't sporting 28 inch quads or anything...