What should a wife do when her husband does not answer to her request,or does not try to understand her feelings?how should she deal with thesituation when they come near only for having sex and they are mentally apart? Please help me

Talk to him about your feelings communicate more.may be situation may change. If that's not possible then you have 2 options- if you want to be with him then accept him as he is. Don't expect anything.it is difficult but you give unconditional love and support always!with time your relation will improve and second option if you don't want to take that pain simply leave him!

If talking cannot bring you together, and end his romping with a girlfriend, then you divorce his a$$, and take all his money.

I know there are cultural differences, but if you are not happy, and he will not work with you to make things better, is divorce an option?

Personally, I would not stay with a man who has a girlfriend. That is not a marriage.