<human>: Can you provide a brief overview of the text?

My dad was married to another woman when my mom fell pregnant.
He divorced and promised to be there for my mom and the baby (me).
He failed to keep that promise and was barely present for ~18 years of my life.
I haven't seen him at all for ~4 years, but my mum (who usually hates him) wants me to make an effort to get in touch?
I told her 'Why should I, he should be the one trying to make amends?'.
She couldn't give any other reason that 'Do you really want to grow up without knowing your dad?'.. I don't really know what to think? I don't know the man? I don't know if it'll be worth the effort? I'm very torn on what to do..
<bot>: Should I get in touch with my dad who I haven't seen in ~ 4 years, and don't know anything about. Need help deciding.