Is it normal that my 13 year old son has a crush on a ten year old?

okay woman relax, stop being soo overprotective, let your kid be its just that he probably began his curiosity for sex and has an interest on her. So its all pretty normal, unless, as already mentioned in previous posts, if he gest a bit older but the girls ten to stay 10, only then you should worry. Infact, be prepared to supply some contraceptive money once he turn 15 at least.