What do you think about my parents giving my sister significantly more help towards her wedding than what they're offered to me for a house. I feel really slighted.
Do you feel like they favor her?
I always get what I deserve and never more and I don't like it
I understand how you're feeling, but it's not right to expect your parents to give you money now that you're an adult. If they want to give your sister a certain amount of money, and you another amount, then that's their prerogative.
I will never be responsible for my actions and I would probably never be happy.
I don't think that's a great way to look at life. If you focus on yourself and don't have expectations that your parents will help you financially, then you'll be much happier.