I have two questions:
Ich habe einen Freund / Ich habe eine Freund
When you use these two words they can both be understood in two ways. One is that you have a normal regular friend and the other is that you are in a relationship with this person.
Is there a way to avoid confusion and what do Germans do in practice?
Freunde / Freundinnen and similar words e.g. (Kunden / Kundinnen) etc.
Do you always have to use both words if you are refering to a group of people that includes males and females?
E.g. "I am hanging out with a group of friends (males and females)", "My customers (males and females) are...". Basically, what do Germans do in practice?