Also, dear, on another note, at the age of 13, what you are feeling is infatuation, not love. At your age, you love your mom, other family members, pets, and food,and other interests that you like doing on a daily basis.
Infatuation is a normal reaction at your age, which gives you the ability to notice what types of people you will later be attracted to and help you in getting to know how you will eventually go about mustering enough courage to ask these people out. There is a chemical reaction during puberty, but it's all part of the life that is still ahead of you. You will learn what types, styles, and characters you'll be attracted to, how to handle rejection, pain of some rejections, and joy of acceptance from others.
But, true love takes nurturing and growing while getting to know the entire person and one month is not enough time to achieve this.
Please don't feel alone in this stage in life, we all go through it and survive, and each relationship will teach us something about ourselves. That's what makes us strong for the future.
Try concentrating on what you want for your future, education wise, and career - other interests as well. Then go out and find common interests in girls you'll get attracted to to share these common interests with.
Remember, there is still and long and fulfilling life ahead of you!