What does it mean when a guy says he wants to be friends though.

All guys think the exact same way. Just like how all women think the same way. All you need is the secret decoder ring.

Or, you could treat them like individuals and actually try to be friends just like you would be friends with a woman. Of course the opposite sexes can be friends.

What does it mean?

It means he wants to be friends.

Assume people actually mean what they're saying unless you've got proof of them lying. Life's a lot easier that way.