When you stop doing good, because of laziness, selfishness and so many other excuses, you are denying Jesus.
Every time you are ashamed to be a believer, to do “church” things because it is embarrassing to you, you are denying Jesus.
Every time you forget to pray, to communicate with God, to look at the world through God’s gracious eyes, you are denying Jesus.
Surely you will find some way not to deny him. Especially if you surround yourself with people who value his message.