I'll be honest, I don't think people replying to you have actually read your full post. Your therapist is breaking A LOT of standard boundaries and throwing up A LOT of red flags. She's a red flag factory at this point.

Lingering hugs, saying she doesn't think she'd ever get over losing you, calling you her favorite client, wanting to come to your wedding...

These are not things that most therapists do, because it creates an unhealthy experience for the client. What you're experiencing isn't normal, standard therapeutic transference. It's way, way, way more than that and has been enabled and encouraged by your therapist.

Maybe it's because you're so young and she genuinely wants to mother you. She probably does genuinely care, but it does seem like you could be in a less than perfect position because of the odd boundaries.

Sorry you're in so much pain.