I am 15 I will be 16 in a week and this guy is 21 will that be legalif I want to date him please someone help me this is serious

It is not illegal to date. However, if you two engage in sexual activities, that is illegal, and he can be arrested for engaging in sexual activities with a minor.

Also, as long as your parents are aware and allow you to date a 21 year old.

Hope this helps.