I imagine they could form a strong attachment even if you don't intend it... But maybe they'd just have hormonal periods and be more normal the rest of the year, if they weren't actually set up for breeding? I can see not wanting to lose the bond you have with your boy. I can also see being afraid to commit to babies without knowing your schedule can accommodate them. Is your job flexible? Could a baby travel with you if needed? When I've had a litter of pups at my house, that was a huge commitment for me, even though my girl was a great mother and did everything right. I still needed to be around for cleaning and moving them in/out for recreation and stimulation. And that was short-lived compared to baby birds!!