Should i forgive my parents and my sister?

Well I'm really angry and upset with my sister and my parents because my sister always got more than me out of life. For example on my sisters 18th birthday she got a BMW but she couldn't even driving it because she didn't p her driving test. It took her four years to p and she could finally drive it. But for my 18th birthday all I got was a Pistols Vinyl and a pair of Dr Martens. I didn't even have a Vinyl player so I would have to go round my friends house just to play my Vinyl but it didn't really matter because the Pistols were the big thing at the time. I went on to like death metal bands like Morbid Angel and Death but that doesn't matter at the moment. My sister also use to get the up to date technology such as clothes and electronics but most of my birthdays I didn't receive a present because our parents spent all the money on her before thinking about my birthday. Christmases were miserable as usual because my sister wanted something that was expensive and cost a lot so that meant my parents wouldn't be able to buy me anything. So on christmas day I use to go round a friends house and get drunk and I had as little to do with my family as possible. But with the anger and pain in my heart from my parents favourtising my sister i used that to study hard and get lots of qualifications and it got rid of the aggression. I then left home when I was 22 and in 1985 I formed a independent record label called Earache Records and I became very successful in the underground extreme metal and punk music industry. I signed bands like Napalm death,Morbid Angel and Carc onto my label and I have quite a lot of money now. I'm getting old though sadly and I don't think I can carry on with this anger in my heart. I don't go to family weddings or funerals for example on my sisters wedding I refused to show up and I did that same on her children's weddings and I refuse to accept them as my nieces and nephews. I have never met my sisters children and I don't answer her phone calls and I haven't seen any of my family for 15 years. Should I let it go and move on?