Melania, transference is complicated and it isn't really limited to therapy. When we fall in love with people, we are projecting all the time, and taking projections in - it's the same thing; only in therapy, the T should be aware of his own 'stuff' and so, rather than project back to you, allows you to project/transfer your stuff to him, in a safe environment. That's pretty much what analytic type therapies are based on - the therapist/patient relationship. A lot of transference/projections are unconscious, he might not remind you physically of someone but the dynamic between you could be playing out something which is still unconscious. Therapy is partly about surfacing some of those unconscious fantasies because then we can know ourselves better.

That doesn't mean that your feelings are not real or invalidated. Love is love. But it is really not a good idea to have a romantic relationship with your T, so many reasons, as others have posted above. Ultimately it could be very damaging to you, even though it might feel like the only thing you want right now.