Oh Amanda. I'm so sorry for both you, and Belli. :(
As someone who had a neglectful parent though, I can tell you
that the best thing you can do is let Belli come to these
conclusions on her own. My dad still to this day is very hesitant
to say anything bad about my mom. After everything she did to him,
and everything she did to me, he still goes out of his way to
recognize her for the good she DID do - bringing my brother and I
into his life. He still chooses to talk abotu her with love because
of that. It honestly makes me respect him so much, and growing up
it was nice, because as conflicted as my feelings were about my
mom... I never for one second felt like my dad regretted her
presence in his life. I never felt like he resented the pieces of
her he saw in me, if that makes sense?
If I were you, when Belli asks these questions I would tell her
that her dad has been very busy lately, but that you know he loves
her very much and hopefully he will have time to come spend with
her soon. It may feel like a lie to you, but the reality of the
situation is - that's what she needs to hear. With time, she will
come to learn herself that her dad isn't worth her time and that
you were the one who was always there for her. But right now, she
is young and all she needs to know is that her dad loves her. It
would be idea if that came from him, but since it can't... it's OK
if it comes from you. And I'm sure he DOES love her, in his own
way, just as I'm sure my mom DOES love me in hers. At this point,
it doesn't really matter that it's not enough. All she needs to
know is that her dad has redeeming qualities and that he does love
her, even if he can't be bothered to make her a priority right
now.