How do I get rid of alligator skin on my legs?

I have always had alligator skin on my legs. My legs are really soft, I just have criss-cross lines all over them. I have tried putting lotion on al least 3 times a day but it never goes away. I am going to a dance in about a month and a half and I'm wearing a dress that goes to my knees. I'm going with a boy I really like and I can't have him seeing my nasty line covered legs. PLEASE HELP. Thanks bunches... :)