[AricGoffgog]

Brother you must have something in common with the sister? Besides deen there must be something? If you really don't have anything, you have deen right? That is a good conversation starter.

What exactly is/are the problems? From what you've described it seems the problem is lack of communication. You need to speak to her and get her to speak to you. Talk and talk to each other about the problems you are facing. Take her away for the weekend to some hotel (if you can afford it) and speak to her.

If you however find after much talking that you both don't want to take it forward, then don't feel trapped and stay in the marriage for the sake of it. Move on from it.

Also, why don't you use contraception in the meanwhile (instead of stopping sex completely) until you are sure you are happy with the way the marriage is going? This is completely permissibly and if I recall correctly even encouraged when one is thinking about separation from ones wife.

Btw what type of feelings where you expecting after three months into marriage? Marriage is hard work because two people who are from completely different background and upbringing are put together to live with each other and even share a bed. It takes a lot of time (for some years) to get used to each other's habits and character.