Erotic transference has an element of attraction/sexual feelings. And the word transference tends to be misused a lot of the time (often by therapists, I think). Transference is the transfer of feelings about one person onto another (I,e. you're attracted to your T because they remind you of someone from your past that you were involved with, not because you actually find them physically attractive). What some call ET can simply be real attraction with the addition of an intimate setting, undivided attention and acceptance. Since this doesn't sound like what you're experiencing I'd say attachment is more likely. What it's called doesn't really matter so much as how it's addressed so no harm is done.