I have been having a loss of appetite for about a week now.i just can't eat much. i am preparing to graduate soon could it be stress? how do i fix it?

Yes, stress can: cause loss of appetite. Please see your doc to rule out medical conditions. If it continues see a mental health professional to teach you some stress management techniques. Congratulations on nearing graduation. As you learn to cope w/this situation it will serve you well for the inevitable life stressors we all face. Peace and good health.