not many options to increase friendship dragon age 2?

Answer 1

The best way to increase friendships in Dragon Age 2 is to visit your companions each act. Just follow the dialogue trees in a way that best fits their personality.

Also, an easy way for members of the opposite sex (and sometimes the same) is to constantly choose the romantic option. This will earn you huge friendship points, but might lead you to some undesired effects, so to speak, hah.

Just learn what each character likes.