Should I give baby my last name?

Hi, I'm a FTM in my late 20s and about 6-7 weeks pregnant. I'm "in a relationship" with the soon to be father of my child. I put the relationship status in quotes because it doesn't feel anything like a relationship should. Most of the time I feel alone and he isn't as active as I hope in our current status, which leads me to believe that he won't be committed to being a father. 
Anyway, I know it's too early to be thinking of this but I considered giving the child my last name. Reason being is 1) I don't see the  father and I being together much longer in an imbalanced relationship  2) Should I have to proceed and be a single mom, I'd at least like the last names to match. 
What do you guys think? **Please keep rude comments to yourself** 😉