Is this a mean thing to do?

Just be honest with her and tell her you're no longer interested. It's mean to lead her on and make her think it's going somewhere when it isn't.

This is something that may re-occur several times throughout your life. If you care about her feelings, then talk with her but be firm. Indicate that you need distance, and that you need her to respect this. Don't raise your voice or shout, but again be firm with your resolve. She must know that whatever she tries to "get back in" with you will be unsuccessful, and that it's time for her to accept reality.

Don't lead her on anymore, you will just end up hurting the girl even more. Tell her how you feel, and the longer you don't tell her the more she will get attached to you.

Tell her you are not interested dude, just be up front and honest. It will hurt her for a little bit but she will be happier in the long run.

then this means that u dont like her so its time for u and her to move on so call her tell her lets meet and break up wit her but do it gently or eles ur gonna get hurt as in bye bye car or byebye nuts lol

Be honest, even if you think that that's "mean," honesty is best. It might hurt her but at least she knows the truth. You would feel better for being honest too.

You need to tell her ASAP that you've lost interest and it's over, don't play the distancing game, that'll hurt more, leave unanswered questions, and you wouldn't like it if she did that to you.

It's like a Band-Aid, rip it off fast and the pain will only last a short while

now...as a girl...with a girl's opinion...if i didn't know you weren't interested in me anymore, i would bad mouth you to everybody and call you a jerk. so be honest with her and just tell her you think it's time you guys moved on. it's better that way :)

Yes, it is mean and a very immature thing to do as well. You should just be honest with her so she stops wasting her time on you. Just put yourself in her shoes, what would you rather do?