I'm going to take my dads money
Why do you think you'll be able to take your dad's money?
My dad is so gullible for believing I love him
You should avoid using people that love and care about you. If you continue to do this, you will not have their support when you need it the most.
It's not a big deal. My dad can't even support himself.
You need to focus on a better relationship with your dad that does not involve money so that you can keep the relationship.