I'm sorry this has happened to you.
I don't want to cause you further upset but I know two women in your situation and I want to tell you about their current realities. Both women moved here for a relationship, got decent jobs and had children with their partners. After a few years the relationships broke down. The women I know where concerned about doing the 'right' thing for their kids so stayed in this country to enable the childrens relationship with their fathers.
These are two separate cases, but it has ended the same way. The women both wish that they had taken their child immediately and gone back to their home country. They have no family support and do so much on their own. The kids fathers get to see their kids, yes, but the real hard work parenting comes down to the mothers. As do the financial demands. If this is going to be your situation, life might be easier in your own comfort zone.
The women I know have not had succesful new relationships here, and in one case her ex married someone else and started a new family. Every second weekend she is hurt by the reminder that her ex went on to have the family they planned together with someone else. Her little boy loves the visits to his 'big' family. I see how much that hurts her.
They miss their own culture. They miss their own families and they need a bit of extra support. The kids are now older and they could not move them. These women are stuck in limbo until their kids go to uni, or even longer.
Please consider where you will be happy for the next 18 years. Be selfish, it's a long time. Your partner has been selfish - allow yourself some happiness. Figure out where parenting your child is going to be easiest for you.
I'm sorry if this added more stress, I just see these wonderful women and wouldn't wish this on anyone.