"Because I want to" might best be said as "Porque quiero hacerlo".
If you mean the short form of because it is porque, in Spanish porque stands for why, because and because of. If you are referring to the cause of something, than it is (la) causa.
Do you mean how do you say want in Spanish? The word "want" doesn't mean anything in Spanish because it is an English word. In spanish the infinitive "to want" is querar. I want is yo quiero.
because he dont want them and its no one business
To say 'I want a chair' in Spanish, you would say 'Quiero una silla.'
To say 'I want meat' in Spanish, you would say 'Yo quiero carne.'
To say 'I want bread' in Spanish, you would say 'Yo quiero pan.'
To say 'I want paper' in Spanish, you would say 'Yo quiero papel.'
To say 'I want cereal' in Spanish, you would say 'Yo quiero cereales.'
To say 'I want to eat a carrot' in Spanish, you would say 'Yo quiero comer una zanahoria.'
"I want to sleep" would be "Quiero dormir".
To say 'I want some folders' in Spanish, you would say 'Quiero unas carpetas.'
querer- to want
I want = Quiero