Is it possible for?????

First off, I got asked why all my questions are in r&s. The reason is I like answers from hopefully Christians. Now my question is. I have a best friend who is a senior in high school and will graduate in June and toto college in Flo. I am a freshman in highschool. Someone told me recently that she can't possibly be a real friend because of the three year age difference and the grade difference. But we talk about everything and do things together email, talk. So, I am asking all Christians. Do you think this is possible. It is for us. And what do you say back to a fellow Christian who says this to you. This may sound like a corny question but it's been bothering me.