My dear think twice before yu take that life time step.
Remember you are go to face pressure more than him.
Why has'nt he gone for medical treatment before now. Though it will be difficult breaking up but u have to face reality and forget about love for now.
You will definitely find love somewhere. I wish u luck.

I think saying thank you isn't a big deal even if it skip your mind sometimes simply tell her sorry dear it skip mind. It's because you don't appreciate her in the first place that's why she's demanding for it. So please learn to appreciate all the way.

She looks good. I hope to see her baby soon.

Try to dialogue with her, don't get tired. Am married and in my case reverse is the case. I v been married for 14 years and I experienced worst than d ones ur wife is giving you. So my brother don't give up. Marriage is for better and for worse. You are not doing anything wrong. She wants to be the problem maker, you just keep being the peace maker.