Recently my 2nd wife find out that I was looking for a 3rd wife and during the argument she started getting wild and attacking me with her fist, to the extent that I started bleeding from a scratch. Ever since that day I have not had any inclination of touching her or even being close to her. May Allaah forgive me.

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.

You are not sinful to lack inclination towards your wife as long as you are not neglectful of her rights like providing for her, spending the night with her and the like. You have to know that marital life is scarcely free from problems. For marital life to be stable, neither spouse should deliberately wrong the other and should be merciful about the other's mistakes, especially the husband towards his wife. The Prophet said: "The woman has been created from a rib (the rib is crooked) and she will never continue to be as you desire her to be (i.e. always obedient). If you enjoy her, you will do so while she is still a crooked rib. If you try to make it straight, you will break it, and breaking it means divorcing her." [Al-Bukhari] So we advise you to continue living with your wife and endeavour to forget what happened, especially if she regretted her act and her negligence towards you. If your wife persists on being dominant and disobeys you, then she is a disobedient wife. The method of dealing with a disobedient wife has been mentioned in details in Fatwa: 83402. 

Allaah knows best.