What is a 'good Christian'?
Look, God has provided gifts to each of His children, whether they know it or not. Are those gifts given to them to edify themselves, or to be able to say 'look at me, I have this gift'?
No, He gives His gives to men (and women) in order to minister to each other. Each has a gift that the others need.
A person who is ill needs one with the gift of healing, and one with the gift of faith, and of prayer and intercession.
A person suffering from addiction or some inheritted malady needs someone with the gift of deliverance.
If YOU do not go to church, YOU will not benefit from the gifts of others, and, THEY will not benefit from your gifts.
Do you think church is just a social club? If so, you are right, we don't need it.
But God told us not to forsake gathering together. He told us that for a reason. We need each other, physically, emotionally, spirtually.
So why would you not go to church? Are you selfish, and refuse to share what God has given you? Are you so self-sufficient that you have no need of others?
Perhaps you don't want to go because the people there are not perfect, and have faults, and are generally rather hypocritical? Well, of course they are. You won't find a church filled with perfect people.
Church is for those who have been lost and are finding their way, for those who have stepped out of thier corruption into the light, and are learning how to walk in it, for those who are spiritual babies still learning how to get off the milk and onto veggies and meat.
It is for those who think they are so much more mature than the rest. They need it perhaps most of all.
In short, we all, each of us, including you, are in the position of needing what the church, the gathering, provides.
My advice? Go to church, if not for yourself, then for them.