Don't know How to tell Parents.............

Ok here goes........
I grew up in a very tight knit family......My parents are caring, loving, and are always there for me when I need them but they are also sheltering, controlling, smothering, and over protective. I've grown up to be quite the young women but at 21 I still feel like a child and I am growing to resent them for it. Now I am pregnant and am being thrown into "adulthood" since I have decided to keep the baby. I haven't yet told my parents and I feel it will be the most difficult thing and am terrified at their reaction. My mother can be very emotional and I fear that they will think of me as a disgrace to the family. My boyfriend and I have been together for two years now and although we've had our ups and downs I love him to death........Unfortunately my parents hate him and they forbid me from being with him, they think he isn't good enough for me and that he has caused me much pain.......My mother has told me that if she finds out I am with him she will basically disown me......she's forcing me to burn everything he has given or written to me........This is killing me inside because I love him and I know he is a good person and I don't want it to seem like I am choosing them over him.......And now that I am having his child he will be apart of my life and theirs forever........He has a good job now and is joining the NYPD, he's already saved some money and has been looking for apartments for us........We've never had the perfect relationship but i love him to death and he loves me the same.........All I want is for them to accept me and to accept him and to let me live my life..........My parents snoop through my room, listen to my phone conversations, etc. and they don't see anything wrong with it.......I don't know how they are going to react when I tell them that I am with him and that we are going to have a baby.........I feel like they are gonna kill me........let me remind you that I am 21 years old but I guess to them I'm still a baby..........I don't know what to do any advice would be great