What to do if i'm almost 15 and i have a desire to masturbate every day, but i do it once a week. is it okey to masturbate once a day or two days?

Of course it is: You're kind of young to be here, and maybe you should be talking with Dad and/or your personal physician instead. However, essentially all your peers are already enjoying their bodies several times a week. The only reason for less often is that you prefer a "harder" ejaculation. The practice won't hurt you, keeps you comfortable, and you're learning about yourself in preparation for adult life.