I think the "A" word is connoted in a very negative sense on this forum at times. Attachment is equated with unhealthy transference and neediness, when actually, healthy, secure attachment isn't about getting your needs met by other people; it's just a relationship of caring and respect that a person has for another person. So yes, therapists absolutely can have attachment to clients--very healthy attachments in fact.

That said, if you think this particular therapist is trying to draw you back into therapy because of an unhealthy countertransference issue, then that would be a good reason not to return. On the other hand, if this therapist in simply trying to encourage you to continue your therapy work because she hates to see you put yourself aside for monetary reasons, that may not be an unhealthy thing at all. Hard to know without all the details.