Should I give my son his fathers last name anyway?

Cheryl • The mommy of a beautiful baby boy born May 27th, 2017. 😊😍👶🏾💙. Single mother but has a family full of love ❤️
So I had been with my boyfriend for 10 years so when I got pregnant it wasn't planned but it happened. He didn't want me to keep my son he wanted me to get an abortion tried to force to get an abortion and threatened to brake up with me if I didn't get one. so I told him if hes asking me to choose between him or our baby I choose our baby! and haven't looked back since but now I'm wondering should I still give my child his last name or should I just give him my last name ? 
I don't know if he plans on being apart of our sons life but I'm just debating the last name situation 

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