I know how you feel. I am going to a Rays game alone this summer and I am going to feel odd. There isn't anything wrong with it, but it definitely is weird and a bit scary being alone like that. If I were you I would quickly try to find people to talk to because it's so much easier that way. When I go to the game I am just going to talk to the people there so I don't feel so alone.
Wishing you the best,