I am in utter confusion. I am not able to take a decision and feeling completely drowned amidst complications.

I was all willing and fine to get married to this person. Got all ready for the wedding and just about a week before the wedding, I was suddenly abused by my fiancé' who was completely drunk. I also figured out that he had been a complete alcoholic and did anything he could for the sake of the liquid- Borrowed money from me, and from my siblings and friends in my goodwill and used it in a pub. The argument started when I questioned the behavior. He picked up the quarrel so violently that he even said he was marrying to get the share in the money I earn. I am otherwise a waste in his life.
Shattered on the most disappointing experience of my life, I broke with him and decided not to go ahead to marry him. I went into a mode of complete depression. He tried to get me back and did everything that he could- wrote emails to my friends and sent emotional emails to them explaining how I treated him, still he loves me... to my business compotators on how we were together and sent pictures of our holiday together etc.
I was humiliated. Flabbergasted. And don't tell me what! I did a blunder of taking him to my Office party too and seemed happy with him in the crowd and let the world know that I am getting married with the bloke.

Days and months passed, things have settled.

In the meanwhile, I met a guy and he said he was interested in me. He carefully understands my stand and has been a good friend. I know his credentials well and he was my sister's childhood friend and both my sister and this guy did their schooling together and both had an opportunity to work in a same organization for 3 years.
When I checked with her, she always has good things to tell about me. My sister and her husband are asking me to go ahead with the relationship if I am comfortable with him. I clearly understand that he has not been holding mask and try to impress me unnecessarily. I agree too- he is a nice person.

My problem is- The past haunt me. I am scared to get into a relationship, I fear if the man willing to marry me is for the money and wealth I hold. I am also terribly worried about what the people I know think about me on my marriage? Should I not tell them that I am getting married at all? I am upset and confused.
Please advice me and help me to take a decision.

Try not to judge all people by the actions of one (dare I say) man. It will take time, but you need to learn to trust people and know that not all people are like the one who you have been exposed to.

Should things develop with this person, make sure you take them slow. The slower you go, the better for now. If you rush it, you will get scared and back off and most likely lose him, then you won't know what could have been.