I am in the same boat as you but it's MY parents that don't like my fiance..... we have been dating for 3 years now and got engaged this past Christmas... when I told my parents they were not happy at all.... they say I can do SO much better, but I love him and want to be with him. We have 2 kids and 1 on the way and I couldn't be happier. I mean sure we have our fights but what couple doesn't?? They were getting on my nerves so much about him that I just got up and moved away from where we were....I used to live in Manitoba, Canada and now I am living in Alberta. It makes me feel like my parents don't want me to be happy at all... his parents are very supportive of me and were VERY happy when we told them we were engaged!! I don't know what it is about parents today.... they way I see it is if your kid is happy BE HAPPY FOR THEM cause if that is the person they love and want to be with that is the one they are going to be with and seeing how 18 years of age you are considered an adult they really have no say in whom you want to spend you life with.... I let my parents make my every move till I was 19 and now they see I' living my life the way I want to live my life and they are finally realizing they have no say...I have a family now with this guy and I can't be any more happier then what I am!!!
And as for you I think you guys should just go on living your life...if they love their son then one day they will come around and see who YOU really are and that you are not the bad person they think you are!!! Just hang in there.....