Pregnant & I don't know if I should keep it ?

Okay so let me start out by saying im 21 & still in college & 6 weeks pregnant. I'm pregnant to a guy i dated for a few months & that doesn't have a job, smokes marijuana & that my parents hate with a passion ( I have been threaten to be cut off from the family & financially if I even spoke to him). And to make things worse I find out I'm pregnant when I started dating my ex fianc� whom I am still inlove with & was really looking forward to fixing our relationship. I don't know what to do I'm scared if I keep the baby I'll lose my loved ones forever & I'll be completely alone taking care of my baby, plus i work part dental assistant & wont be able to continue that job if i keep the baby due to the x-rays & nitrous so i wouldnt have any income, but at the same time I dont want to regret having an abortion & I feel bad taking a life away. Please give me some advice I'm completely confused