Was I arrogant?

I came home very late the day before yesterday, because I talk with my colleagues. However, I'm now not sure about whether I did right. We talked about foreign language learning, and almost I was talking all the time, the others just chimed in with me. I'm sure I know how to learn a foreign language a little better than the others, but I don't know why could I dash along as long as two hours. It was like that I was giving a presentation to show off myself. I felt I was so arrogant and I'm so embarrass to meet them. I don't know how they think of me. I'm now thinking about myself. I should be careful to express myself. What do you think about this? If you were me, how would you express and act?