Will my criminal charges be dropped once I turn 18?

I ran away and then was caught. I was charged with theft thy same day for a laptop that I sold from my school. Then the next week I ran away again. I think I am supposed to be on probabtion but haven't gotten any documents because I ran away. Will these charges drop when I'm 18 even though I didn't complete (or even start) probation and whatnot?? Pleaseee help me. Thanks.