My cousin has meet this indian man and she really wants him to come to the uk,so thay they can be 2 gether hel?

help,is it so easy to get a visit visa,thats for 6 mths,shes willing marry him if all goes well,he said hes not bothered about coming to the uk,could she go to him,he just wants to be with her where ever they live,he can come on a student visa but the cost is higher that way help she needs answers thanks x