re: I said no to marriage with my cousin - and getting emotional blackmail…
Chameli firstly hug May Allah protect you always, ameen !
Secondly , they fed and clothed you , they sang to you they look aftered you … they changed your dirty nappies. What went wrong?
Ask them.
You have done nothing wrong. A woman has 100% right to chose who she marries, its an Islamic requirement. Why then do they ask at the nikkah 3 times qabool hai ?
Your parents went to another country built their life from utter rubbish to what you are now, and they want you to marry some fool after your visa? this is how much they love you?
You are a very strong willed woman. I honestly saltue you , i would have never waited for my sister to be settled with her husband .. nor wait 4 years. 
MasAllah you are a gem.
Pink Orchids - DO NOT GO TO PAKISTAN!! you will be forced into a marriage take heed from chameli and dont ever step foot there again. There is no justice there for you to run and hide or escape from a forced marriage. Just keep strong willed and say NO.
It may be better if you do move out ( if you can afford it) if you cannot if you live in the UK you can go to a womens refuge and recieve housing somewhere officially after a while.
As futile as it seems my prayers are with you InsAllah it will work out for the best just keep saying NO! X