Tansference is putting problems onto the therapist to be worked out. for example a client feeling like the therapist is acting like their abuser when the therapist is trying to get the client to work on a problem. then in the process the client lets the therapist know by saying something like "you're just like so and so"

Attachment is carring about the therapist, thinking about the therapist, dreaming about the therapist.

The way I keep the two straight is with the saying -

I am attached to those friends and significant others in my life.

and also - transfering means moving something - a lamp from a desk to a stand. a paper from the notebook to the table.

so transfering in therapy is moving from one therapist to another to get work done.

and transference is moving a problem from me to the therapist to work on it.

hang in there.