I stamp alone too. I actually enjoy it for the most part.
I went with some friends to a weekend retreat that was actually hosted by my good friend who is a CM consultant, but I told her I was bringing my stamping stuff. She was just thrilled to have me along. She was the only woman I knew, and I have come away with some new friends. I did really enjoy the social aspect (and there was a LOT of laughter, which is weird when you do it by yourself at home). She had her stuff set up, but she is not a hard seller. Perfect for me.
I have a group of friends who scrap, and we get together quarterly at each person's house. I stamp instead (I used to scrap, long story, will do it again someday).
I also put together card ideas and have my 3 crafty friends come over. I did one at Christmas and we made a total of 10 cards, 3 of each style + 1 "special" one that was more complicated. I gave them the envelopes to go with their cards, and they all said that I should charge, because they knew that there was cost involved. After we all discussed what kinds of cards they would like to have in their stash (manly, birthday, and sympathy), I have come up with another set of projects and will charge $10 per person. I have a TON of paper, many ideas, and am happy to share.
Never fear, for you are never alone.