what do i do in this situation

I have a high pair like JJ and i got a tight player that calls my raise pre and the board comes low rainbow he bets and i raise KNOWING i have the best hand and we get it all in and he has like AQ but the board hits his Q to get me out of there. Its frustrating when time after time I know 100% that I have the best hand and get beat. how do i keep my confidence?

if you have more equity when you're allin,you played it right.losing the pot doesnt make you a worse player.

All you can do is get your money in "good" after that its out of your hands... what ever happens happens. You played that hand right.