I have been a Christian for, gosh, I guess about 20 years also. I can understand where you are coming from. Sometimes, we just need to be ministered to in a different way. Perhaps a good Christian concert would be the thing you need right now. Sometimes, visiting another Christian church can help also. I have got to have a certain type of pastor, or else, I tend to get burned out with going to church. I never get burned out on God... just the act of going to church. I need a pastor that teaches/preaches things that I can apply to myself today. Sometimes, I need an "in-your-face" type of pastor to hold my attention. I love it when pastors use real life examples and comedy in sermons. I think that in these last days, times are going to get harder for the Christian. The main thing is to remain a Christian and to stick it out with God. Again, I don't think that you are tired of Christianity, I think that you are just a little burned out. I don't want to advise you NOT to go to church, but, maybe you just need a getaway. Maybe you need a vacation... not from God, but just from life. Shake up your schedule. Maybe attend Wednesday night church this week instead of on Sunday. I wish you all the best. Remember, you are walking the straight and narrow path and it is not always easy.
God Bless You!