I'm 26 & unmarried. Should I have this baby?

[Love]

Here's a little background information:
My first boyfriend was at 13 years old in the 9th grade. He was 16 and a senior. He cheated on me with a girl in the 10th grade who had the same name as me. He lead me to believe they broke up and he took my virginity at 14 on March 07, 2001.
He graduated highschool and went to the Navy. He kept in contact with both of us. This resulted in fights and suspensions from school. I dated another young man in hs when I was 16 and ended up having an abortion. When I was 17, I fell in love with someone else and he cheated so, I got another abortion. When I was in college, i dated someone else and I thought I was in love then but, I got another abortion.
I had so many abortions because my parents were very strict and Christian so, I was scared.
Years later my parents passed away. I got back together with my ex at 23 years old. I was a college student, had a fulltime job and had my own apartment. He was 27, living at home with his parents, went to college and had a 6 year old daughter. The girl he cheated on me with was the mother.
We've been living together since 2010. He promised we'd get married before I was 25. I'm 26 now. I caught him in lies, photos in his iphone, facebook inbox messages, instagram comments, twitter messages, voicemail, numbers in his bookbag, the list goes on. Yet, I forgave him.
His thing is he's not marrying anyone unless they can forgive him and stop bringing up the past. On New Years Eve, I found out that I'm pregnant again. I'm completey scared. My Christian aunts are 100% supportive bc I'm old enough to have a child and they would help me. But, I never envisioned my life to be a babymama, while pursing a career as a realtor and law student.
I don't even feel the same way I felt about him anymore. He acts like this is a game saying, "I'm about to be 30 so, I'm ready for another child." He's a chronic weed smoker and he drinks alot. Even called me a bitch and a nigga before. What should I do? I'm 6 weeks