Can I marry my mother's cousin

I am in love with this guy who happens to be my mothers cousin(the relationship is that my mothers mothering I.e my grandmother and his mother both are real sisters).i really want to marry this guy and want to know whether I can legally marry him under Hindu marriage act or special marriage act.i am Sindhi by caste and his family is fully supportive of this marriage but my family isn't as they are not sure on legality of this marriage .i would be highly greatful to u if u advise me whether I can get married to him legally or not.and are there any other alternative solutions to this problem.