How can I curb my appetite?

I am 21, 5'6" and 107lbs and I work out at least once a day. I LOVE to eat. I graze throughout the day but when I have a big meal my stomach bloats and I look like I'm pregnant! I want to know if there are any healthy ways to curb my appetite because I easily spend $250 a month on food for just me. It seems I'm hungry all the time!