I hate myself for missing my dad's funeral.
Why did you miss his funeral?
I didn't feel like traveling.
You should always support your family, especially when there's a death in the family. You should have taken the time to travel so you could be there for your father's funeral. You should make it up to your family by going to visit them as soon as possible.
I don't love my family though.
Even if you don't love the rest of your family, if you loved your dad, then you should visit them. At the very least give them a quick visit so they know you still cared about your dad. It also would give you a chance to pay your respects at your father's grave.