19 yrs old and feel pressure to get married

Well as the title says, I'm a 19 year old girl and I feel pressure from my parents to get married. I come from a country in which girls get married quiet young (it's a European country), however I live in the UK. I am currently in eduction and marriage is the last thing on my mind. I have plenty of time for that and I'm ridiculously young to get married. My parents aren't as tradition as some parents, but when it comes to marriage they are. Me and my mum have always had a difficult relationship. She claims I can open up to her about everything and anything but that's just not the case. She's a very judgemental and often verbally aggressive person. She doesn't realise that what she says hurts me. I try to tell her but she just shits me down and says I shouldn't speak back to her and I have no respect for her. She just isn't willing to understand. This issue came up recently when one of my female cousins got married and she is 18. I'm honestly not judgemental and I know she's happy and I'm happy for her. Good on her. But it's just not my thing. I want to get a great education and I want to live my life and I know I'll have plenty of time for marriage. My mother says it doesn't bother her but it does. In my culture if a girl is not married by the age of 20 she is seen as 'defective' or 'past it'. It's ridiculous. I can tell when my mum talks about it that she wishes I too would get married and find someone. She is a very unapproachable person and I tell her now and I shrug it of but I can't do it for much longer. She is a very overbearing woman. I feel that I've disappointed her by not focusing on domestic life as it were and marriage. I've had enough. Recently I've been getting really down and depressed about it and I cry constantly. I feel that no matter how successful I am in my education and other parts of my life, as long as I'm not married by 20 I'll have failed.