Having trouble with gender

Why do you say 'Je te presente mon amie, Claire?'  I am female and Claire is female, and I'm told that 'friend' has an e at the end.  So why ' mon amie'?

Salut de Marseille ! Good question, normally, the form would be ma for the feminine. But because amie begins with a vowel, the mon is used for euphony, so you don't have the two "clashing" a sounds (or two vowel sounds in general) next to each other.

I should add, this goes for words with h muet (silent 'h') also, like mon histoire (even though it's feminine).