Not at all! Jeans should fit you comfortably, and it’s a good idea to know your measurements and preferred styles when shopping, so that you choose a pair that not only looks good on you, but fits you well.
As a general rule, jeans should be “tight” enough that you don’t need a belt to wear them, but “loose” enough so that they don’t feel constricting, or like they’ll rip and tear if you move or squat.