My Gracie came to me after living with a single male for 2 years...lets just say that she greatly prefers my dad and brother (and any other person or place) to me. But i persistently work with her and she is gradually warming up to me...a little. 
You're in a better situation though, because you can increase the time you're interacting with your tiel before it's completely bonded to your boyfriend over you.
You're in a better situation though, because you can increase the time you're interacting with your tiel before it's completely bonded to your boyfriend over you. 
