Christians who feel like they are all alone in their convictions or their devoutness to God have the Elijah Complex. I've had it before-- and maybe you have, too. Or perhaps, ironically, I am all alone in this.
This Elijah Complex, this sense that you are unique in your level of commitment or concern, is not healthy for the body or for the soul. It leads to discouragement, a mixture of depression and despair, and complaints to others and to God.
Elijah had thought he was alone, too. He complained to God about it: "I've been so devoted to you, God! " I'm paraphrasing. " But these people, they threw you away, and killed everyone who stood up for you. Now there's only me and they're out to get me, too" (1 Kings 19:14/ Romans 11:3). God wasn't too impressed.
Not only is this complex unhealthy, it is a lie.
Sorry: you're not as alone as you feared/hoped.
Take a God-eye view of your situation and realize you are not alone, and be encouraged that God has preserved others, somewhere. In Elijah's time, God had preserved 7,000 others who had stayed devoted. The knowledge that you are not alone, that God has preserved others, even if you never see or meet them, and that he will in fact preserve you, too, leads to determination and endurance.
So don't give up. Listen to God's gentle whisper, and endure with confidence.