Janie, there's no reason you can't lead a song in singalong style-- as long as the material is easily harmonized and as long as you let people know you welcome harmony. Experienced harmonizers can use that harmony to move to their more comfortable range and still be in your key. (That doesn't work for me-- where I songlead most is in church or similar settings where people want to sing the melody, and nothing but.)

Also, I would bet that it isn't so that "no one" can sing with you-- some of the men and some of the women will be able to, in your octave or in an octave higher or lower. Or some of them may be able to join you on either the chorus or the verse-- a lot of songs actually span two ranges. In fact, on some of our songs, I take some of the lines and Greg takes some of them-- we both are singing ALL of them, but not all at full voice. WE hear it as kind of not-the-best, when we're actually doing it-- but when we listen back on the recording, it actually sounds fine. We've used harmony the same way-- the Louvin brothers's records gave us the tip that it is OK for the singers to swap who is on melody and who is on harmony. So maybe a partner would be fun to work with. It IS nice having a second range in your pocket to go to! :~)

When I started I had a voice much higher than most people found comfortable in singing with, in unison. But there were ministries we wanted to pursue, so I went to keys not the best for my voice. As time went on, however, doing that taught me a lot of vocal tricks which, had I known them sooner, might have prevented some of the vocal damage in my voice now. You might try a single session or two with a voice teacher or vocal coach, if you can find one that will not try to develop you into the kind of voice they prefer and know how to work with.

~Susan