Have them say something to the effect of, "Hey (name), I know you have feelings for me, but I don't feel the same way for you. I think you're a great person and I really want to keep in touch with you, but I don't think we are perfect for a relationship."
Hey (his name) this is really important to me so I hope you take this well... I do not think it is the right time for us to be together. Ive been trying to find the words to say this because recently it has been very difficult for me to focus on myself and there are some struggles that I have going on personally (orr make something up). Because of this I do not think I can properly treat you the way you deserve romantically because I need to work on myself first. I know you love me and I am so grateful that you are in my life but it would be selfish if I can't give you all you deserve in this moment. So I would like if we could just stay friends because I do not think I am ready to move forward with relationships yet.
Since 1 gram fat = 9 calories and the candy bar has 10 grams of fat you would do 10 x 9 and that equals 90 calories. Then you would just divide 90 by 7.6 which rounds to 11.8