Should I leave my husband for his lack of motivation and selfishness?

[Lizzy]

I want out of my marriage, but I need to make sure I am doing the right thing.
I met my husband back in 2009. Since we started dating we have had problems. He looks at every woman that crosses his path. One night at a party he even went as far as rubbing up himself against this girl. I forgave him for that incident, and a few months later we moved in together. While living together, he was looking up other females on MySpace and Facebook to go on dates with. He made me feel like I was not enough for him and after a year of dealing with the crap I left.

While we were broken up, he talked bad about me to his friends and family. After all that I decided to give him a second chance. 3 months after we got back together I got pregnant. Being pregnant did not change things; he was still looking at females. He even asked me to leave when I was 7 months pregnant. After our son was born we got married. We wanted to do the right thing.
Just recently he went on Facebook to look up porn stars. He ended liking this girl Facebook. He even crashed our laptop from watching porn. It cost $200 to fix the laptop. Oh, and he has a problem with taking females phone numbers at work. I told him that this was not allowed, but to no avail.

After getting married I realized how negative of a person my husband was. Everything was so "bad" and nothing was ever good enough. He has drained me mentally and physically with his negativity. In addition to being negative, he is not motivated in life to be better than what he is. Right now he is depending on me to support the family and I think it should be the other way around. Let me explain more in details. I have a Masters in Accountancy and a CPA license and he has a Bachelors degree in Marketing. We are both unemployed. I stay up until 2/3:00am looking for jobs. I will be lucky if he spend 2 hours looking for work. 90% of the time I have to ask him if he looked for a job. I feel like I am his mother. He is so forgetful-I have to remind him of doing stuff around the house. He can't even remember to take out the trash at night.

A year and a half ago I talked him into going for his MBA. He started the program and got kicked out after the first semester due to bad grades. He has no concept of time and therefore, turned in his assignments late. Recently I convinced him to start over the MBA program. He registered with the school and that was it. The school requested documents for Financial Aid and he has yet to provide them with their request. Again, this is something I constantly have to be on his back about. I am at the point in my life where I need someone to meet me 50/50. I do not want a man to depend on me to take care of the family because he is lazy and unmotivated. This older gentle man (an acquaintance of ours) said that I would be supporting my husband the rest of my life. This is clearly what I do not want.

At this point, I am ready to move on. My husband and I do not have a relationship. We have not had sex in two years. He spends most of time jerking off. I am so over this relationship. The only reason why I have not left is because he has no job and he is broke. He makes me unhappy. I am not the bubble, happy girl I used to be. What should I do?