Hi!

I'm German and have been learning English for quite some time now. I'm pretty fluent, but every now and then I come upon something that I find rather confusing. One of such things is the use of the pronouns 'me' and 'I' in English. I often read both of the following phrases:

A) My friends and me...

B) My friends and I...

And now I really want to know which form is correct? Or are they both correct? And if so when exactly do you use 'me' and when 'I'?

Thanks in advance for your helpful replies. :)