The first step is to speak to either an Uncle or aunty in church that can help you take the walk of getting back the fire and love for God.

It’s good to understand that you are not alone in this. Once in a while people go through this in their Christian walk. But it’s also very important to know you shouldn’t hide it to yourself. One of the things that the devil does when he wants to attack is separate you from others, or to make you hide your struggles to yourself and magnify it so much that it now looks overwhelming and insurmountable.
The best decision will be to talk with a trusted and matured Christian. You can can talk to an uncle or aunty in church. You can talk to a pastor. If your parents are committed and matured Christians you can also talk to them. Share your struggles with them and they can help you.
You also need to watch what you have been occupying your days with, what you you read, the associations you’ve been keeping outside church, the friends you keep, the environment you have been spending most of your time in. This could just be the reason the fire is going down. Spend more time with the word, prayer a lot more in tongues. Listen to more messages, watch videos of good Christian services and programs. Listen to edifying Christian music, and it will amaze you how the fire stokes up..

Sometimes even the best of us can feel this way, and I really think the answers the others have given especially Didy will help you make the right decision.Sometimes it may not be as serious as you think it is, at other times you may just need some help to get back on track, but you will be fine.