Especially in daytime I find it difficult to:

1. Approach larger groups of girls when on my own and
1.1 Approach a girl if in the group there are guys.
I think that my issue here is that I'm not a big talker and social guy, if I don't know and like the people I'm not interested in conversation and I'd rather be on my own, so I find it unnatural talking to strangers and find it difficult being direct in the above situations.

2. Approach a girl if there are people around
In this case I find it stifling to talk to the girl as having eavesdroppers would make me and, I always think, her uncomfortable

What do you guys do in these situations?