You raised preflop, got one caller, flop comes. A continuation bet (c-bet) is betting because you had the lead — not because you always have it.
C-bet more on dry flops (K72 rainbow) where fewer hands connect. C-bet less on wet coordinated flops (9♠ 8♠ 7♦) multiway where someone connected. Blind c-betting every flop is a leak your buddy will fund for you.