Ayyye, I found my thread! Thank you again for all of the advice, ladies.
I finally brought this topic up to my bf, and he reacted poorly, which really pissed me off...
I thought he'd be more understanding to my concern, but he was frustrated that I asked him again when/if we'd be getting married. I personally do not think it's wrong of me to question our future relationship status, but whatever...
So, I'm still undecided about the last name. We have 14 weeks or less before baby is here, so I'm confident we'll have a decision made by then.
When I asked my best friend's advice on this matter, she brought up a very good point; him wanting the baby to have his last name shows his commitment to the baby, which is all I should be asking for. Our relationship, whether it lasts or not, is irrelevant. What's most important is his relationship with his daughter. So, that's something I'll be mulling over. I hate to procrastinate, but I think her name will just have to wait to be decided until the day she is born.