Sir, I’m a 21 yr old guy. Having normal mental status. However, I don’t know why I’m not very much interested in talking with girls. I feel shy of talking with them. May be due to a dark complexion. Otherwise, I’m a confident guy. I’m always in front in every talk or every field.

This is a very common problem with many boys and reasons can be many. I need more details to analyze reasons. Complexion can be one of the major considerations in first sight attraction but on long run girl will look for love, affection, maturity and respect you have for her.