The debate here is not about how old you are, or how much of an age gap there is... the fact is that she is 14 YEARS OLD. She is still a child, both in her body and her mind. She will NOT understand that it is just sex so that you can enjoy a tight pussy. She won't have enough life experience to see that. She will think that you actually love her and you will break her heart when she finds out that it's not true. Then, when it doesn't work out in the end, she WILL continue to fuck anything that shows any interest because a) she will want to feel loved again, and b) once you start having sex you enjoy it and want more. The difference is, she'll be a slut and you'll be a legend.
Are you willing to do that to an inocent child, just to keep your dick happy? That's wrong! Let her be a child for a little longer. Don't spoil that for her.