For me it also always difficult to find someone, who goes to the concert with me!!!
My friends only like some Bon Jovi songs which they heard in the radio, but they are not interessted in going to a concert. And also they say, the tickets are too expensive for them. They would come with me, if I bought them the tickets..... but I don't want to spend that much money!!!! I'm not soooo rich!!!!! So, once I took my brother with me, or I went alone.
If you have no other choice, going alone is also ok, I think!!! There are so many people on the concert...... I'm sure you can meet some nice persons there!!! And when the concert starts...... then you don't need anybody around!!!!!