Keeping my baby or abortion

I'm 19 and found out I was pregnant 12 days ago I'm so confused on what to do I have had an abortion before with the same guys baby, he did promise me that I would never have to go through an abortion ever again but he's asked me to have an abortion and his mum said I need to have one! But I don't want an abortion but how can I put him through something he's not ready for I just don't know what to do I love him so much we have been together for 4 years now I live with my mum still and I have no job (recently fired) My family said they will support me through this but they are pressuring me to keep it, any advice on what I should do?