Is it okay to like a boy one year younger than you?

Yes, it is clearly okay to like a boy that is one year younger than you. There are many people who do that. Take marriages for instance. Both in a marriage are usually not the same age. Then therefore, that clearly demonstrates that it is okay.

Another answer:

Yes it is completely OK. I like someone who's a year younger than me. Just simply have your closest friend ask him out for you so you don't get laughed not that you will but to be on the safe side. Just tell him how you really feel and wear amazing clothes the day you ask him out.