My question is that islaam is a religion for men and women both , as a women is His creation too , women sacrifices a lot for man leaving her parents house , giving birth to childern taking all the pains serving her husband well then when a man decides to marry(for reasons such as sex) it hurts women a lot as women s world is her husband and child what about her getting so much hurt didn't this permission of second marriage makes the first wife insecure and hurt ,what about her feelings I'm sure allah understands women needs tooo,it so much toture for women.

You're going to have to write your question more clearly. I have no idea what you are asking because you have written one long sentence. Take your time.

A husband who divorces his first wife, or takes a second wife?

It sounds like your husband took a second wife. Under Islam (and if your country's laws allow it) he can if he can support both of you. Yes, it hurts. Islam still carries old traditions and laws that other religions have changed in more recent times. Women are supposed to be treated and honored but often aren't because men have so many rights that women don't have.

Are you in the same house or separate? Do you have parents or other family, sisters or brothers, nearby, who can keep you company?